QSA practice exam

The graph below represents the motion of a car traveling horizontally along a straight stretch of road in the positive direction.

What is the average acceleration of the car during the

time interval shown?

• 0 m/s^2

• 5 m/s^2

• 10 m/s^2

• 20 m/s^2

A boat initially moving at 10 m/s accelerates at 2 m/s for 10 s. What is the velocity of the boat after 10 seconds?

• 20 m/s

• 30 m/s

• 40 m/s

• 50 m/s

A ball is released from rest and accelerates in the positive direction down an inclined plane as shown by the graph below.

Refer to the information and graph. What is the velocity of the ball at t = 4 s?

• 2.5 m/s

• 5.0 m/s

• 10 m/s

• 20 m/s

A student throws a ball straight down off a very high building with a magnitude of 3.0 m/s. The ball accelerates in free fall for 2.0 s.

What is the velocity at 2.0 s?

• 6 m/s

• 23 m/s

• 18 m/s

• 1.5 m/s

A ball is released from rest and accelerates in the positive direction down an inclined plane as shown by the graph below.

According to the information and graph, which best describes the motion of the ball?

• constant velocity

• increasing velocity

• decreasing velocity

• need more information

An object initially at rest moves according to the Velocity - Time Graph shown below.

Refer to the information and graph. Which interval has the greatest displacement?

• 1 s to 2 s

• 2 s to 3 s

• 3 s to 4 s

• 4 s to 5 s

Two students walk toward each other at constant velocity as shown in the position v. time

graph below.

According to the information and graph, what does the intersection of the two graphs represent?

• The students have equivalent velocities.

• The students have reversed direction and are heading back toward the origin.

• The students have equivalent displacements.

• None of these

In the lab, a student is investigating the effects of texting and driving on reaction time. A student determines his / her reaction time by having a friend release a meter stick at random intervals while the driver sends text messages. The student, on average, catches the meter stick after it has traveled 0.64 m.

How far will the student travel in a car moving at 25 m/s horizontally before reacting?

• 0.64 m

• 16 m

• 9.0 m

• 69 m

A cyclist is traveling along a level, straight road at 10 m/s in a positive direction with a xi = 0. The magnitude of the velocity for the cyclist is tracked using the following motion graph.

According to the information and graph above, how far will the cyclist be from his or her initial position after two seconds?

• 10 m

• 20 m

• 22 m

• 24 m