Force and Acceleration Quiz

The diagram shows a wagon being pulled with force of 30 N. The force causes the wagon to move at a constant speed of 5 m/s. What will happen if the force changes to 20 N?

• The wagon will move at a constant speed of 6 m/s.

• The speed of the wagon will not change.

• The speed of the wagon will increase.

• The speed of the wagon will decrease.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Alex pushes both a child and an adult on a swing. Why is it easier for Alex to push the child?

• Less force is required to accelerate smaller mass.

• More force is required to accelerate smaller mass.

• A stationary object will remain at rest unless acted upon by some external force.

• A moving object will continue to move unless acted upon by some external force.

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Which of the following graphs is showing a zero-acceleration?

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A magician pulls the tablecloth out from under the dishes. Choose the statement that best explains the science behind the act.

• A body remains at rest unless acted on by an unbalanced force.

• Every action has an equal an opposite reaction.

• Acceleration increases as force increases.

• Acceleration decreases as mass increases.

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NGSS.MS-PS3-5

NamielTitlustration demonstrates an unbalanced force?

• Picture A

• Picture B

• Picture C

• Picture D

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NGSS.MS-PS2-2

Alex and Maya are pushing a box from opposite directions. What is the net force on the box and in which direction will it move?

• The net force on the box is 12 N and it will move towards Maya.

• The net force on the box is 12 N and it will move towards Alex.

• The net force on the box is -12 N and it will move sideways.

• The net force on the box is 12 N but the box will remain stationary.

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How much force should be exerted to move a toy car of mass 0.5 kg to accelerate at 4.5 m/s²?

Formula of Force is F = m x a

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NGSS.MS-PS2-2

As a man jumps out of a boat onto a river bank, the boat moves backwards. Why do you think the boat moves backwards?

• The man pushes the boat backward with the same force as the boat pushes the man forward.

• The man pushes the boat forward with more force than the boat pushes the man backward.

• The boat pushes the man forward with more force than the man pushes the boat backward.

• The boat and the man do not push each other at all.

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NGSS.MS-PS2-1

Alex pushed against two grocery carts with the same amount of force. Cart A moved but Cart B remained stationary. Which statement best describes why Cart B didn't move?

• The more mass an object has, the harder it is to accelerate the object.

• The less mass an object has, the harder it is to accelerate the object.

• The more force applied to an object, the harder it is to accelerate the object.

• The less force applied to an object, the harder it is to accelerate the object.

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A Student graphed the position of an object during a 14-second time interval. Which statement correctly describes the object between 0 and 7 seconds?

• The object accelerated at a constant rate of 3 m/s² until 3 seconds.

• The object had a constant velocity of 1 m/s until 7 seconds.

• The object was stationary for 3 seconds before it started moving.

• The object was stationary with a velocity of 1 m/s until 7 seconds.

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