Force & Motion Assessment

A ball is rolled across a flat surface covered by carpet. Then, with the same equal force, the ball is rolled on a flat, smooth surface. Which best explains why the ball rolls slower on the surface covered by carpet than on the smooth surface?

• There is less gravity between the ball & the carpet.

• There is less friction between the ball & the carpet.

• There is more gravity between the ball & the carpet.

• There is more friction between the ball & the carpet.

Which best explains how mass affects the motion of an object?

• As the mass of an object increases, the force needed to move it increases.

• As the mass of an object decreases, the force needed to move it increases.

• As the mass of an object increases, the force needed to move it decreases.

• As the mass of an object changes, the force needed to move it remains the same.

Which force does an airplane have to overcome to stay in flight?

• friction

• gravity

• inertia

• momentum

Michael loads a wagon with wood. Which would most likely be the effect of adding more wood to the wagon?

• The force of gravity acting on the wagon will increase.

• The force of gravity acting on the wagon will decrease.

• The amount of force required to move the wagon will increase.

• The amount of force required to move the wagon will decrease.

If a person pushes against a ball and the ball moves, which is true?

• The person is applying force to the ball.

• The person is changing the mass of the ball.

• The force of gravity is less than the mass of the bal.

• The force of friction is greater than the force of gravity.

How far did the bus travel in 4 minutes?

• 500 m

• 800 m

• 1000 m

• 2000 m

Which sentence describes the motion of the robot between seconds 3 and 4?

• The robot was moving away from the starting point.

• The robot was moving toward the starting point.

• The robot was stopped in one place away from the starting point.

• The robot was moving back & forth around the starting point.

Alex & Jaelin are competing to see who can throw a softball the farthest distance. Jaelin threw the softball 42 yards. Which will most likely cause Alex to throw a softball FARTHER than Jaelin?

• changing the direction in which she throws the ball

• throwing the ball with a greater amount of force

• throwing the ball with a lesser amount of force

• adding additional mass to the softball

Which object rolled the fastest?

• Object A

• Object B

• Object C

• Object D

Which best describes the student's walk?

• The student went up a hill, and then down a hill.

• The student walked very quickly at the beginning of the walk, but then slowed down at the end.

• The student walked at a steady pace, & then returned to the starting point.

• The student walked slowly at the beginning of the walk, and faster at the end.