# PHYSICS FINAL EXAM - answer choice

first law of motion
according to newton’s ________ law, an object with no net force acting on it remains at rest or in motion with a constant velocity.
second law of motion
according to newton’s ________ law, force of an object is directly related to mass (acceleration)
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greater than
static friction is ______ kinetic friction
upward 300N
if the weight of a balloon is 3000N and the lift force provided by the atmosphere is 3300N, in which direction is the net force and the magnitude?
copper
a 10 kg block of material and they’re coefficient of kinetic friction at a constant velocity; aluminum (0.47), brass (0.44), copper (0.36), and steel (0.57) which block requires the smallest applied force to keep it moving at constant velocity
-50N
the magnitude of the force that a baseball bat exerts on a ball is 50 newtons. the magnitude of the force that the ball exerts on the bat is
28N southwest
a 20N force due north and a 20N force dun east act concurrently on an object. what is needed to bring the object into a state of equilibrium
equilibrium
when the sum of the forces acting on an object is zero, the object is in
4 N toward the left
two forces act concurrently on an object on a horizontal frictionless surface. what would also prevent the box from moving
move with a net force of 5N
a person applies a parallel force on 50N on a crate and the static friction force is 45N. the box will _______
kg(m/s^2)
the derived unit for N is ________
inertia
when the index card is quickly pulled away from the glass in a horizontal direction the disk fall straight down into the glass. the action is a result of the disk’s _________
December 7
physics test ch. 4
c
a box is a rest on an incline plane, which vector best represents the direction of the normal force acting on the box
decreases
the diagram shows a force of magnitude F applied to a mass at an angle relative to a horizontal frictionless surface. as angle theta is increased, the horizontal acceleration of the mass ________
a 5 kg block at rest of a horizontal frictionless table. which answer best represents the force exerted on the block by the table
the elevator is increasing upward
a man standing on a scale in an elevator notices that the scale reads 30N greater than his normal weight. which type of movement of the elevator could cause this greater-than-normal reading?
Fn Ff

Fw

a block is at rest on an incline, which diagrams best represent the forces action on the block? (Ff=frictional force, Fn=normal force, and Fw=weight)
a bicycle moving at constant speed on a straight, level road
in which situation is the net force on the object equal to zero?
parabolic
the path of a projectile fired at a 30° angle to the horizontal is best described as
0.0m/s
a ball thrown vertically upward reaches a maximum height of 30m above the surface of earth. at its maximum height its velocity is ________.
range
the horizontal distance traveled by a projectile is the __________.
a 45° angle
four identical projectiles are launched with the same initial speed, v, but at various angles above the level ground. what represents the initial velocity of the projectile that will have the largest total horizontal displacement?
a 90° angle
a volleyball hit into the air has an initial speed of 10m/s which vector represents the angle above the horizontal that the ball should be hit to remain in the air for the greatest amount of time?
ball A hits the tabletop at the same time as ball B
when the lever is released, the support rod withdraws ball B allowing it to fall. at the same instant, the rod contacts ball A, propelling it horizontally to the left. which statement describes the motion that is observed after the lever is released and the balls fall
ball A’s horizontal velocity remains constant
when the lever is released, the support rod withdraws from ball B allowing it to fall at the same instant the rod contacts ball A propelling it horizontally to the left which statement describes the motion the is observed after the lever is released and the balls fall?
the same time
a red ball and a green ball are simultaneously thrown horizontally from the same height. the red ball has an initial speed of 40m/s and the green ball is 20m/s. compare the time it takes the red ball to reach the ground to the time it takes the green ball to reach the ground
shorter flight time and longer horizontal range
an archer uses a bow to fire two similar arrows with the same string force. one arrow is fired at an angle of 60 degrees with the horizontal and the other is fired at an angle of 45 degrees with the horizontal. compared to the arrow fired at 60 degrees, the arrow at 45 degree angle has a ____________.
trajectory
the path of a projectile is the __________.
this graph represents kicking a soccer ball into the air over a given displacement.
45 degrees
if a cannon ball is shot from a launcher, at what angle will it reach its maximum displacement?
vector
a quantity that has both magnitude and direction is called ______.
scalar
a quantity that has both magnitude and direction is called __________.
speed
which is not a vector quantity?
a vector contains both a __________.
4
which set of vectors would you use to Pythagorean theorem to solve for resultant vector?
5
which set of vectors would you use law of cosine to solve for the resultant vector?
1
which set of vectors is equal in magnitude and direction
2
which set of vectors is equal in magnitude but opposite in direction?
3
which set of vectors has a different magnitude but same direction?
which vector diagram represents the greatest magnitude of displacement for an object?
the vector diagram below represents two forces F1 and F2 simultaneously acting on an object. which vector best represents the resultant force?
the vector below represents the resultant of two forces acting concurrently on an object at point P.
which pair of vectors best represent two concurrent forces that combine to produce this resultant force vector?
a force was resolved into two perpendicular components F1 and F2 as shown in the diagram below.
which vector best represents the original force?
the diagram below shows resultant vector R. which diagram best represents a pair of component vectors A and B that would combine to form resultant vector R?
which diagram represents a box with all component forces are cancelled and the box will not move?
9.81 m/s²
the units for gravitational on the planet earth is _____________.
0 m/s
a ball is dropped from a tower 60m high. what is the initial vertical velocity of the ball?
magnitude and direction
the two main parts for a vector are _________.
lower than planet earth
the acceleration on the planet earth in -9.81 m/s² the acceleration of the moon would be ______________.
m/s
the units for velocity (speed) are ________________.
0.0 m/s
a ball thrown vertically upward reaches a maximum height of 30m above the earths surface. at its maximum height, the speed of the ball is ____________.
m
the units for displacement are _______________.
s
the units for time are ______________.
acceleration remains constant and velocity increases.
a rock is dropped from a bridge. what happens to the magnitude of the acceleration and the speed of the rock as it falls?
m/s²
the units for acceleration are _____________________.
October 1
physics test ch. 2
the diagram below represents the relationship between velocity and time of travel for 4 cars A, B, C, and D in straight line motion. which car has the greatest acceleration during the time interval 10 sec – 15 sec?
distance and speed
which terms both represent scalar quantities?
_________________________________________________________
diagram A
_________________________________________________________
diagram B
_________________________________________________________
diagram C
_________________________________________________________
diagram D
_________________________________________________________
diagram E
_________________________________________________________
diagram A
which ticker tape has the highest velocity?
diagram C
which ticker tape has the slowest velocity?
diagram D
which ticker tape show the object is slowing down?
diagram E
which ticker tape has the highest acceleration?
s
the units for time are _______________.
constant velocity
an object that has the same average velocity for all time intervals is moving at __________.
m/s²
the units for acceleration are __________.
displacement vs. Time
CD
during which interval is the cart stopped?
BC
during which interval is the cart increasing in constant velocity?
DE
during which interval is the cart slowing down at constant speed?
AB
during which interval is the cart accelerating forward?
BC
during which interval is the cart moving forward a t constant speed?
constant acceleration
motion that can be described by a constant slope on a velocity time graph is
scalar
a quantity that has only magnitude is a ____________.
m/s
the units for velocity are ________________.
instantaneous acceleration
on a velocity-time graph a point at a specific time is the _____________.
m
the units for displacement are ________________.
magnitude and direction
the two main parts for a vector are _________________.
1,800m
the map shows the route traveled by a school bus. what is the magnitude of the total displacement of the school bus from the start to the end of its route?
120
the measurement contains a total of 3 sig figs
12.00
which measurement contains a total of 4 sig figs
210.1 g + 235.1 g
expressed to the correct number of sig figs, the sum of two masses is 445.2 grams. which two masses produce this answer?
2.58 cm²
what is the product of (2.324 cm x 1.11 cm) with the correct number of sig figs
second
the base SI unit for time is the _____________.
centi
the metric prefix the means 10-9 is _______________.
a linear graph
the graph below shows the velocity of a race car moving along as a function of time. this graph is ______.
increases
the graph below represents the motion of an object. according to the graph, as time increases, the displacement of the object __________.
.30m
the graph represents the elongation of a spring as a function of the applied force. according to the graph if a force of 18N is applied to a spring, the elongation of the spring is
20 N
the graph below represents the elongation of a spring as a function of a applied force. according to the graph, if you would like to stretch the spring 0.35 m the approximate force to apply would be?
kilogram
the base SI unit for mass is ____________.
which choice represents a power graph?
SDS data sheets
Mrs. Weeden enters the science room while you are performing an experiment and asks you if this chemical is dangerous, you should refer her to ________.
eye washer station
which picture refers to safety?
4.3° C
the diagram below represents a Celsius thermometer recording a certain temperature. what is the correct reading of it?