Force and Motion

What is a force that opposes motion?

• Direction

• Friction

• Potential energy

• Kinetic Energy

What causes a change in motion?

• Force

• Position

• Potential energy

• Kinetic energy

What is described by an object’s direction and speed?

• Friction

• Force

• Motion

• Potential energy

Energy of motion is known as —

• light energy

• elastic potential energy

• kinetic energy

• gravitational potential energy

Students described the amount of force needed to change the motion for each ball from idle to rolling. Which statement is true?

• The bowling ball has less mass, but it took more force to make it roll.

• The bowling ball has more mass, therefore it took more force to make it roll.

• The beach ball has less mass, but it took more force to make it roll.

• The beach ball has more mass, therefore it took less force to make it roll.

Which statements are correct about the conversion of energy of the marble?

• Potential energy changes to kinetic energy from A to B.

• Kinetic energy changes to potential energy from B to C.

• Kinetic energy changes to potential energy from C to D.

• Potential energy changes to kinetic energy from C to D.

Which statements are correct about the conversion of energy of the marble?

• Potential energy changes to kinetic energy from A to B.

• Kinetic energy changes to potential energy from B to C.

• Kinetic energy changes to potential energy from C to D.

• Potential energy changes to kinetic energy from C to D.

The force that holds the planets in orbit around the sun is called—

• gravity

• motion

• friction

• pressure

What kind of energy does an apple hanging on a tree limb have?

• motion

• potential

• kinetic

• friction

A child is riding her bike on a straight path as shown in the image.

A friend applies a force on the bike as shown in the second picture. How will the motion of the bike change?

• 
• It will go slower with more force

• It will go faster with less force

• It will go faster in the opposite direction