in the figure above, which diagram represents the vector subtraction *C=A-B*

IV

in the figure above, which diagram represents the vector addition *C=A+B*

II

an object is released from rest on a planet that has no atmosphere. the object falls freely for 2.0 meters in the first second. what is the magnitude of the acceleration due to gravity on the planet?

4.0 m/s*s

a projectile is fired with the initial velocity Vo at angle theta with the horizontal and follows the trajectory shown above. which of the following pairs of graphs best represents the vertical components of the velocity and acceleration, v and a, respectively, of the projectile as functions of time t?

downward graph and straight across graph

a ball is rolled down a ramp and launched horizontally from a lab bench towards a cup that has been placed on the floor. the following pieces of data were collected about the experimental setup. how much time is the ball in air before it is in the plane of the top of the cup?

square root of 2 s

a ball is rolled down a ramp and launched horizontally from a lab bench towards a cup that has been placed on the floor. the following pieces of data were collected about the experimental setup. how far from the end of the ramp should the cup be placed on the floor so that the ball will land on the inside of the cup?

100*square root 2 cm

which of the following is the speed of the ball at the bottom of the ramp?

100 cm/s

balls 1 and 2 are each thrown horizontally from the same height above level ground, but ball 2 has a greater initial velocity after leaving the thrower’s hand. if air resistance is negligible, how do the accelerations of the balls and the times it takes them to hit the ground compare?

equal equal

which of the following is an example of projectile motion?

a thrown baseball

a ball is thrown at an angle of 30 degrees to the horizontal with a speed of 20 m/s. what is the ball’s initial vertical velocity?

10 m/s

in the figure above, the magnitude of the ball’s velocity is least at location

B

in the figure above, at which point is the ball’s speed about equal to the speed at which it was tossed?

C

at what point of the ball’s path shown in the figure above is the vertical component of the ball’s velocity zero?

B

in the figure above, the horizontal component of the balls velocity at point A is:

equal to the horizontal component of its initial velocity

in the figure above, the magnitude of the ball’s velocity is greatest at location

D

a ball is thrown at an angle of 30 degrees to the horizontal with a speed of 20 m/s. how long is the ball in air assuming it was thrown from ground level?

2 s

which of the following statements applies to the motion of a ball rising and then falling in free fall?

I, II, and III

how much time does it take the rock to travel from the edge of the building to the ground?

square root (2h/g)

how do the speeds of the ball at the three points compare?

Vq

which of the following diagrams best shows the direction of the acceleration of the ball at point P?

downward arrow

how do the speeds of the ball at the three points compare?

Vq

a ball is thrown with an initial speed of 20 m/s at an angle of 60 degrees to the ground. if air resistance is negligible, what is the ball’s speed at the instant it reaches its maximum height from the ground?

10 m/s

a ball is throws at an angle of 30 degrees to the horizontal with speed of 20 m/s. what is the ball’s initial horizontal velocity?

10 square root 3 m/s

an object is shot vertically upward into the air with a positive initial velocity. which of the following correctly describes the velocity and acceleration of the object at its maximum elevation?

zero negative

a diver initially moving horizontally with speed v dives off the edge of a vertical cliff and lands in a the water a distance *d* from the base of the cliff. how far from the base of the cliff would the diver have landed if the diver initially had been moving horizontally with speed 2v?

2d