APP1 Projectile Motion Review

AP Review - Motion in Two Dimensions

Multiple Choice

In a projectile motion we always have...

• 1 component (x)

• 3 components (x,y, and z)

• 2 components (x and y)

• 0 components

Multiple Choice

An object is projected horizontally from a cliff.  The time it takes to hit the ground is

• more than if it was just dropped
• less than if it was just dropped
• the same amount of time than if it was just dropped
• impossible to determine

Multiple Choice

What is the vertical acceleration of a projectile?

• 0 m/s²

• 9.8 m/s²

Multiple Choice

What is the horizontal acceleration of a projectile?

• 0 m/s²
• 9.8 m/s²

Multiple Choice

In the absense of air resistance, as an object travels through the air, its horizontal velocity

• changes

• remains the same

Multiple Choice

A ball is thrown into the air at some angle. At the very top of the ball's path, its velocity is

• entirely vertical

• both vertical and horizontal

• entirely horizontal

• not enough info

Multiple Choice

In the absence of air resistance, the angle at which a thrown ball will go the farthest is

• 15^o
• 30⁰
• 45^o
• 60⁰

Multiple Choice

At what point is v_y= 0 m/s?

• A

• B

• C

• D

• None of these points

Multiple Choice

At what point is v_x= 0 m/s?

• A

• B

• C

• D

• None of these points

Multiple Choice

Which vector pair (arrow pair) correctly represents the acceleration and velocity at point P?

Multiple Choice

Suppose Lemming A runs off the edge of the cliff at 2 m/s and Lemming B runs off the edge at 1 m/s. Which will hit the ground first?

• A

• B

• Both at the same time

Multiple Choice

Once a projectile is launched, what is the only force that affects its motion?

• mass

• friction

• inertia

• gravity

Multiple Choice

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How far did the ball travel horizontally when it hit the ground?

• 14.3 m
• 30.55 m
• 65 m
• 43.55 m

Multiple Choice

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How far did the ball travel horizontally when it hit the ground?

• 14.3 m
• 30.55 m
• 65 m
• 43.55 m

Multiple Choice

A projectile is fired horizontally from a height of 20 meters above the ground, with an initial velocity of 7.0 m/s. How far does the projectile travel horizontally before it reaches the ground?

• 3.5 m

• 7 m

• 14 m

• 20 m

• 140 m

Multiple Choice

A group of students wish to determine the launch speed of a specific 'launcher' device that they are using in a projectile experiment. The group is using the launcher to launch a ball horizontally from the top of their lab table, to land on the floor below. The group has already measured the height of the table, relative to the floor below. Which one of the following sets of additional measurements would be adequate to allow the group to determine the ball's launch speed, without taking any extraneous/unnecessary measurements?

• Only the horizontal distance moved by the ball during its motion.

• The horizontal distance moved by the ball during its motion, as well as the time the ball falls

• The time the ball falls for, as well as the mass of the ball.

• Only the horizontal distance moved by the ball during its

  The horizontal distance moved by the ball during its motion, the time the ball falls for, and also the mass of the ball.

Multiple Choice

In a lab experiment, a ball is rolled down a ramp so that it leaves the edge of the table with a horizontal velocity v. If the table has a height h above the ground, how far away from the edge of the table, a distance x, does the ball land? You may neglect air friction in this problem.

• $$\frac{2v^2}{g}$$

• $$v\sqrt[]{\frac{2h}{g}}$$

• $$\frac{2vh}{g}$$

• $$\frac{2h}{g}$$

• none of these

Multiple Choice

A diver moving horizontally with speed v dives from a cliff that is y meters high and lands a distance d from the base of the cliff. How far from the base of the cliff would the diver land, still going speed v, if the cliff were 4y meters high?

• ½ d meters from the base

• d meters from the base

• 2 d meters from the base

• 4 d meters from the base

• Cannot be determined

Multiple Choice

A projectile is fired with initial velocity vo at an angle θ 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?

Multiple Choice

A projectile is fired with initial velocity vo at an angle θ with the horizontal and follows the trajectory shown above. Which of the following pairs of graphs best represents the horizontal components of the velocity and acceleration. v and a, respectively, of the projectile as functions of time t?