Unit 4 Energy of Motion Review

As a roller coaster goes downhill

• kinetic energy is converted into potential energy

• potential energy is converted into kinetic energy

• electrical energy is converted into potential energy

• potential energy is converted into electrical energy

If Shane and Susan both push on a box with a force of 25 N, but in opposite directions, what will happen to the box?

• the box will not move

• the box will slide toward Shane

• the box will slide toward Susan

• the box will be perpendicular to both Shane and Susan

Which of these is a good example of Newton's first Law of Inertia

• a ball sits motionless on the ground

• a ball gathers speed as it rolls downhill

• a ball accelerates as it falls out of the classroom window

• a ball slows down after it is kicked through the grass

What must occur to a shopping cart at rest in order to make it roll forward?

• A force must be provided to overcome gravity

• balanced forces must be acting upon the cart

• an unbalanced force applied to the cart pushing or pulling it forward

• the unbalanced force acting upon it must be smaller than that of friction

An object that has kinetic energy must be

• at rest

• stopped

• in motion

• at an elevated position

What would be an ideal experiment to test how different types of surfaces affect friction?

• two objects of equal weight placed on two glass surfaces of equal lengths

• two objects of equal weight placed on two glass surfaces of unequal lengths

• two objects of equal weights placed on a glass surface and a wooden surface

• two objects of different weights placed on two wooden surfaces of unequal lengths

Wind energy is used to rotate the sails of a windmill. The rotating sails have

• heat energy

• kinetic energy

• potential energy

• electromagnetic energy

The force that slows down and eventually stops a ball you roll across the pavement is called

• kinetic force

• friction force

• the slow force

• potential force

How does an object's mass affect its inertia?

• increasing an object's mass decreases its inertia

• increasing an object's mass will increase its inertia

• there will be no effect on its inertia

• decreasing an object's mass will increase its inertia

A book is resting on a table. The book has

• kinetic energy only

• potential energy only

• both kinetic and potential energy

• neither kinetic or potential energy