Force and Motion Review

Front

Which of these would NOT change the velocity of an object?

Back

The object maintaining constant speed and direction.

Front

Which is the force that acts whenever two surfaces or objects move past one another that can slow an object down because of its push in the opposite direction?

Back

friction

Front

What will definitely cause a change in the velocity of a parked car?

Back

The car experiences an unbalanced force.

Front

Why did the salt shaker stop moving?

Back

The table exerts a force that is opposite to the salt shaker's motion.

Front

Why does the balloon cart not move when air flows out of the balloon?

Back

The force on the cart from the air in the balloon and the friction on the ties is balanced.

Front

Which soccer ball(s) experienced the strongest force when it was kicked? Use the information in the diagram to answer the question.

Back

The blue soccer ball because it changed speed the most.

Front

Which skateboard(s) experienced the strongest force when bumped?

Back

The green skateboard experienced the strongest force because it changed speed the most.

Front

Hannah just finished building a house of cards that stands four stories high. She is worried that it will fall down. Which of the following statements is definitely true?
As long as nobody touches the house of cards, it will remain standing.,
A house of cards is too fragile and must fall down eventually., If no unbalanced force acts upon the house of cards, then it will remain standing forever., If Hannah adds another card to the house of cards, then it will fall down.

Back

If no unbalanced force acts upon the house of cards, then it will remain standing forever.

Front

What will happen to a cylindrical object at rest on a table when an unbalanced force is applied, assuming no friction?

Back

The object will move in the direction of the unbalanced force.

Front

What will happen immediately after the unbalanced force is removed from a cylindrical object at rest on a table with no friction?

Back

The object will continue to move at a constant speed.