Physics

centimeter
The length of line AB shown is closes to one
A—————-B
0.523 g
The mass of 100 paper clips is measured at 52.3 grams. The mass of a single paper clip from this group would be closest to
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100 centimeters
A reasonable height for a chalk tray above the floor is closest to
0.85 meters
The length of a string is 85 centimeters. Expressed in meters, this length is
18m2
The diagram shown represents a rectangle composed of squares with sides one meter long. What is the area of the rectangle? (Test 1 #9)
meters
The height of an average adult is approximately 1.75
0.300 grams
The mass of 60 paper clips is 18.0 grams. What is the mass of one paper clip?
60. km/hr west
What is the average velocity of a car that travels 30 kilometers due west in 0.50 hour?
0 meters
What is the magnitude of the object’s total displacement after 8.0 seconds? (Test 2 #2)
Displacement slant up & to the right
Velocity horizontal
Which pair of graphs represent the same motion? (Test 2 #4)
20. m/s
A football player kicks a ball with an initial velocity of 25 meters per second at an angle of 53 degrees above the horizontal. The vertical component of the initial velocity of the ball is
0 m/s
What is the initial vertical velocity of the ball? (Test 2 #8)
Displacement curve up & to the right
Velocity slant up & to the right
Which pair of graphs represents the same motion of an object? (Test 2 #13)
Velocity

________
Time

Which graph best represents the relationship between the velocity of an object thrown straight upward from Earth’s surface and the time that elapses while it is in the air? (Test 2 #14)
Velocity slant up & to the right
A steel ball is dropped from a height of 100 meters. Which velocity-time graph best describes the motion of the ball? (Test 2 #16)
2 m/sec
The uniform motion of a cart is shown in the distance versus time graph. What is the average speed of the cart? (Test 2 #17)
20 m/sec
A car travels 300 meters in 15 seconds. What is the average velocity of the car?
moving at a constant speed
The distance-time graph shown represents the motion of a laboratory cart. According to this graph, the cart is (Test 2 #19)
north
The graph shown represents the relationship between velocity and time for a 2.0-kilogram cart that is initially at rest and starts moving northward. In which direction is the cart that is shown traveling at t = 4 seconds? (Test 2 #20)
DE
The graph shown represents the relationship between distance and time for an object in motion. During which interval is the speed of the object changing? (Test 2 #22)
Distance curve up & to the right
Speed slant up & to the right
Which pair of graphs represent the same motion? (Test 2 #23)
D
The accompanying diagram represents the relationship between velocity and time of travel for four cars, A, B, C, and D, in straight-line motion. Which car has the greatest acceleration during the time interval of 10 seconds to 15 seconds? (Test 2 #24)
the same
A red ball and a green ball are simultaneously thrown horizontally from the same height. The red ball has an initial speed of 40 meters per second and the green ball has an initial speed of 20 meters per second. Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground will be
frame of reference
a car travels from A to B at a constant 100 km/hr. Which of the following changes? (Test 2 #27)
The bowling ball fell faster than the softball.
A bowling ball was dropped from the same height and at the same time that a softball was thrown horizontally. Neglecting air resistance, which statement is true?
1
Four arrows are shot horizontally from the top of a tower, as shown below. Which path represents the arrows with the greatest horizontal velocity? (Test 2 #31)
10m/sec2
An object falls freely from rest for three seconds. The acceleration of the object is
190 N
The accompanying diagram shows a child pulling a 50-kilogram friend on a sled by applying a 300 newton force on the sled rope at an angle of 40 degrees with the horizontal. The vertical component of the 300 newton force is approximately (Test 3 #3)
50.N
A 50.N horizontal force is needed to keep an object weighing 500.N moving at a constant velocity of 2.0 meters per second across a horizontal surface. The magnitude of the frictional force acting on the object is
the same
A mosquito flying over a highway strikes the windshield of a moving truck. Compared to the magnitude of the force of the truck on the mosquito during the collision, the magnitude of the force of the mosquito on the truck is
Frictional force and normal force on the block
The accompanying diagram shows a granite block being slid at a constant speed across a horizontal concrete floor by a force parallel to the floor. Which pair of quantities could be used to determine the coefficient of friction for the granite on the concrete?
a bicycle moving at a constant speed on a straight, level road
In which situation is the net force on the object equal to zero?
toward the center of the circular curve
As the car goes around the curve, the centripetal force is directed
12.N
When a 12.N horizontal force is applied to a box on a horizontal tabletop, the box remains at rest. The force of static friction acting on the box is
left
A box is pushed toward the right across a classroom floor. The force of friction on the box is directed toward the
A. 49.1N (table pushes up through the block)
The diagram below shows a 5.00-kilogram block at rest on a horizontal, frictionless table. Which diagram best represents the force exerted on the block by the table? (Test 3 #13)
D. Fn Ft
/
I
Fw
The diagram below represents a block at rest on an incline. Which diagram best represents the forces acting on the block? (Ft = frictional force, Fn = normal force, and Fw = weight) (Test 3 #14)
100.N
A 400.N girl standing on a dock exerts a force of 100.N on a 10000.N sailboat as she pushes it away from the dock. How much force does the sailboat exert on the girl?
50.N
Two students are pushing on a cart, as shown below.
200.N —-> [ ] <------150.N The cart will move as if it were acted on by a single force with a magnitude of
1.50 m/s2
A 50.kg child on a skateboard experiences a 75.N force as shown. What is the expected acceleration of the child? (Test 3 #18)
50.N
A soccer player kicks a 0.5-kg stationary ball with a force of 50.N. What is the force on the player’s foot?
2.N to the left
Two forces act on the 2.kg box shown below.
6.N <------ [2.kg] -------> 4.N
What is the net force acting on the box?
1200.N
I
800.N
A hot air balloon exerts a force of 1200.N while lifting a load of 800.N. Which free-body force diagram depicts the forces involved? (Test 3 #24)
F=2.N—> [1.kg block]
A different force is applied to each of four 1-kilogram blocks to slide them across a uniform steel surface at constant speed as shown below. In which diagram is the coefficient of friction between the block and steel smallest? (Test 3 #37)
attraction between nucleons
The strong force is the force of
strong force
The force that hold protons and neutrons together is known as the
11,250 joules
A 100.kg person acquires a velocity of 15 meters per second down a ski slope. What is the skier’s kinetic energy?
D
A pendulum swings as shown in the diagram. At which position is the kinetic energy of the pendulum bob least? (Test 4 #2)
15,000 joules
A 75.kg boy initially at rest skis down the slope as shown. Assuming no frictional loss, what will be his kinetic energy at the bottom of the slope? (Test 4 #3)
decreases
As a falling apple approaches the ground, its potential energy
decreases
The diagram here shows a 1.kg stone being dropped from a bridge 100 meters above a gorge. As the stone falls, the gravitational potential energy of the stone (Test 4 #6)
potential energy of the pendulum increases
As a pendulum moves from the bottom of its swing to the top of its swing, the
125 joules
An object with a mass of 10.0kg is moving at a speed of 5.00 meters per second. The kinetic energy of the mass is
decreases
As a pendulum travels from the highest point of its swing to the lowest point of its swing, its potential energy
4 Joules
A spring of negligible mass with a spring of constant of 200.N per meter is stretched 0.2 meter. How much potential energy is stored in the spring?
500 joules
When a 5.kg mass is lifted from the ground to a height of 10 meters, the gravitational potential energy of the mass is increased by approximately
quadrupled
If the speed of an object is doubled, its kinetic energy will be
gain in kinetic energy
As an object falls freely near the Earth’s surface, the loss in gravitational potential energy of the object is equal to its
10 meters
A 20.kg object strikes the ground with 1,960 joules of kinetic energy after falling freely from rest. How far above the ground was the object when it was released?
remains the same
As the speed of a bicycle moving along a level-horizontal surface changes from 2 meters per second to 4 meters per second, the magnitude of the bicycle’s gravitational potential energy
1,260 joules
A student rides a bicycle up a 30* hill at a constant speed of 6.00 meters per second. The combined mass of the student and bicycle is 70.0 kilograms. What is the kinetic energy of the student-bicycle during this ride?
200 Joules
The diagram shown represents a frictionless track. A 10.kg block starts from rest at point A and slides along the track. What is the approximate potential energy of the block at point C? (Test 4 #17)
2.0 kg
An object with a speed of 20 meters per second has a kinetic energy of 400 joules. The mass of the object is
500.N/m
When a spring is stretched 0.2 meters from its equilibrium position, it possesses a potential energy of 10.0 joules. What is the spring constant for this spring?
tori has been awake too long
Holy crap im getting tired of making notecards
2.4 joules
A spring has a spring constant of 120.N per meter. How much potential energy is stored in the spring as it is stretched 0.20 meters?
too much work geez take a break mr. farmer smell the roses

5,000 joules

A garden tractor drags a plow with a force of 500.N a distance of 10 meters in 20 seconds. How much work is done?
200 joules
How much work is required to lift a 2.kg mass to a height of 10 meters?
6.N
What force is required to do 60 joules of work in sliding an object a distance of 10 meters across a level floor?
80 joules
How much work is done when a rock weighing 10.N is lifted vertical a distance of 8 meters?
60 joules
A 20-N block is at rest at the bottom of a frictionless incline as shown in the diagram. How much work must be done against gravity to move the block to the top of the incline?
20 joules
The graph shows the force exerted on a block as a function of the block’s displacement in the direction of the force. How much work did the force do in displacing the block 5.0 meters? (Test 4 #28)
15 joules
A net force of 5.N moves a 2.0kg object a distance of 3.0 meters in 3.0 seconds. How much work is done?
150 joules
How much work is done on a 300.N suitcase to life it 0.5 meters?
60 kg-m/sec
The diagram here shows a 1.kg aluminum sphere and a 3.kg copper sphere of equal radius located 20 meters above the ground.
remains the same
When objects exert forces on each other, the total momentum of the system
30kg * m/sec
The momentum of a 5.kg object moving at 6 meters per second is
a 20-kg object moving at 20m/sec
Which of the following objects has the greatest momentum?
product of its mass and velocity
The momentum of a rocket is equal to the
5kg x 2 m/10 sec
A laboratory cart with a mass of 5kg rolls through a distance of 2 meters in 10 seconds. Which of the following mathematical statements can be used to determine the momentum?
increases
As a 1.0kg mass falls freely to the Earth, its momentum
conservation of momentum
A reaction engine acquires motion by ejecting hot gases in the opposite direction. This is an example of the law of
mass and velocity
The momentum of an object is the product of its
0 kg-m/sec
The diagram shown represents two objects at rest on a frictionless horizontal surface with a spring compressed between them. When the compressed spring is released, the two objects are pushed apart. What is the total momentum of the two-object system that is shown after the expansion of the spring?
1.0 x 10^3 kg * m/s east
A 25kg mass travels east with a constant velocity of 40 meters per second. The momentum of this mass is
At the end of 3 seconds of free-fall, the 10.N ball will have a greater momentum than the 5.N ball.
A 5.N ball and a 10.N ball are released simultaneously from a point 50 meters above the surface of the Earth. Neglecting air resistance, which statement is true?
momentum of cannon + momentum of projectile = 0
A 2.0kg toy cannon is at rest on a frictionless surface. A remote triggering device causes a 0.005kg projectile to be fired from the cannon. Which equation describes this system after the cannon is fired?
60kg * m/s
The velocity-time graph represents the motion of a 3kg cart along a straight line. The cart starts at t=0 and initially moves north. What is the magnitude of the change in momentum of the cart between t=0 and t=3 seconds? (Test 5 #19)
its momentum
If the speed of a moving object is doubled, which quantity associated with the object must also double?
1.8 x 10^4kg * m/s due east
what is the momentum of a 1,200kg car traveling at 15m/s due east?
5m/sec
In the diagram shown, a 10kg ball is fired with a velocity of 500m/s from a 1000kg cannon. What is the recoil velocity of the cannon? (Test 5 #25)
the same
As shown in the diagrams, a lump of clay travels horizontally to the right toward a block at rest on a frictionless surface. Upon collision, the clay and the block stick together and move to the right. Compared to the total momentum of the clay and the block before the collision, the momentum of the clay-block system after the collision is (Test 5 #30)
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