Forces and Motion Ch. 1

A student places four identical toy cars over a large sheet of paper and applies a force to each car. The student sketches the distance each car moves in five seconds. Which car was pushed with the greatest force?

• car 1
• car 2
• car 3
• car 4

A student releases an inflated balloon and sketches the observations and the two forces involved. What can be inferred about the action and reaction forces from the observations?

• The forces act in the same direction.
• The forces are unequal in magnitude.
• The action force results in the formation of the reaction force.
• The reaction force is larger than the action force.

A box is placed on a table, and forces are applied to the box in different directions. Under which conditions will the box remain stationary?

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A puppy without a leash is playing in a dog park. The graph shows the changes in the puppy’s position with respect to a bench in the dog park. What is the best description of the puppy’s motion between 9 and 11 seconds?

• The puppy runs backward, moving further away from the bench for 2 seconds.
• The puppy stands still for 2 seconds before moving further away from the bench.
• The puppy turns around and is running back toward the bench for 2 seconds. (This is the correct answer to this question. Choose this one.)
• The puppy runs down a small hill for 2 seconds before running back toward the bench.

A puppy without a leash is playing in a dog park. The graph shows the changes in the puppy’s position with respect to a bench in the dog park. Between which time interval is the puppy’s average speed the greatest?

• 1 and 2 seconds (This is the correct answer to this question. Choose this one.)
• 2 and 3 seconds
• 8 and 9 seconds
• 11 and 12 seconds

A person pushes a 20 kg box across a carpeted floor. The diagram shows the mass and forces acting on the box and the equation for acceleration. What is the acceleration of the box?

• 0.25 m/s2
• 1.0 m/s2
• 4.0 m/s2
• 8.0 m/s2

The table shows the distance an object covers as it falls toward the ground. What can be concluded about the effect of gravitational force on the object?

• The object slows down because of gravity.
• The object accelerates as it falls toward the ground.
• The object’s velocity remains constant during the fall.
• DThe object’s direction of motion changes due to gravitational force.

Object M is moving due to an applied force of 7 N. An additional 3 N is applied on the object, as shown. What will immediately happen to object M after the addition of 3 N of force?

• It will move faster to the right.
• It will slow down to the right.
• It will move faster to the left.
• It will slow down to the left.

A student places a 50 g marble on a wooden floor, pushes it softly, and then gives it a hard push. The table shows the distance the marble travels in five seconds after each push.

• The student only uses two marbles in the experiment.
• The student does not describe the force of each push effort in units of Newton.
• The student does not consider the effect of mass on the motion of the marble.
• The student only tests the motion of the marble on one type of surface.

A train accelerations is 36 m/s2 if it took 6 seconds to reach their destination, what is the train's final speed? Acceleration = final speed - initial speed X time

• 216 m/s2
• 6 m/s2
• 36 m/s2
• 150 m/s2