Lesson 37: Motion Test Draft

Based on the free-body diagram, which of the following describes the motion of the object?

• The object is accelerating downward.

• The object is accelerating to the right.

• The object is moving down with a constant speed.

• The object is moving to the left at an increasing speed.

A car is moving at 25 m/s north. Which of the following is a vector quantity?

• the speed of the car

• the velocity of the car

• the mass of the car

• the distance traveled by the car

A car moves at a constant velocity for 4 s. A student records data on the car's motion, as shown in the table, but the student forgets to label the second column of the table.

Which of the following is the missing label?

• Acceleration (m/s/s)

• Distance (m)

• Force (N)

• Speed (m/s)

Tags

NGSS.MS-PS3-1

Which of the following statements identifies the main difference between vector and scalar quantities?

• Only vectors have direction.

• Only scalars have magnitude.

• Only scalars have units associated with them.

• Only vectors have units associated with them.

A truck is traveling along a highway. The graph shows the truck’s velocity with respect to time. At which labeled point on the graph does the truck have the greatest acceleration?

• point W

• point X

• point Y

• point Z

A rocket with a constant acceleration of 25 m/s/s has an initial velocity of 200 m/s in the same direction as the acceleration. What is the magnitude of the rocket's velocity 10 s later?

• 250 m/s

• 450 m/s

• 1250 m/s

• 1450 m/s

A person rode a sled down a track on a snowy hill. The person started at rest at the top of the hill and stopped on a rough rubber mat at the bottom of the hill. The rack is shown in the diagram. Which of the following graphs best represents the speed of the person on the sled from the top of the hill to the mat?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

A hiker walked on a path. The graph shows the position of the hiker versus time. Six points on the graph are labeled A-F. The hiker started at position A. At which point was the hiker farthest from the starting position?

• B

• C

• D

• E

• F

A hiker walked on a path. The graph shows the hiker's position during fice time intervals, V-Z. At which time interval on the graph was the speed of the hiker the greatest?

• V

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-1

Two rubber balls roll along a straight track toward each other at the same speed. The balls are the same size but have different masses. The two balls collide. Which of the following best describes how the total momentum of the rubber balls is affected by the collision?

• The total momentum stays the same, because the total momentum is conserved.

• The total momentum is doubled, because each ball gains the other ball's momentum.

• The total momentum is reduced by half, because each ball loses half of its momentum.

• The total momentum becomes zero, because the momentum of each ball is equal and opposite.