Energy, Motion and Force Test Review

Mechanical energy is the sum of two types of energy - kinetic energy and potential energy. Which is an example of kinetic energy?

• a snail crawling across a leaf

• a computer monitor sitting on a desk

• a tightly wound spring in a windup toy

• a roller coaster car just before it goes downhill

Which of these is an example of the conversion of gravitational potential energy into kinetic?

• a person running on a track

• an apple falling from a tree to the ground

• a wind-up spring making a toy car move across the floor

• a rubber band being stretched to twice its normal length

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A skydiver jumps out of a plane. He falls downward at a very fast speed. When he opens his parachute, he slows down. He falls at a safer pace until he lands. What force pulled the skydiver to the ground?

• friction

• gravity

• air resistance

• parachute pull

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the scientific meaning of energy?

• anything that has mass

• the ability to cause change

• anything that cannot be seen

• the property of something to take up space

A moving object collides with a stationary object. Which of the following statements is true according to Newton's third law of motion?

• Each object exerts a force on the other, and the two forces are equal and in opposite directions

• Each object exerts a force on the other, and the two forces are the same in magnitude and directions

• Each object exerts a force on the other, and the forces are proportional to the masses of the object

• The moving object exerts a force on the stationary object, but stationary object does not exert a force on the moving object

Tags

NGSS.MS-PS2-1

Which of these is an example of the conversion of elastic potential energy into kinetic energy?

• a person running on a track

• an apple falling from a tree to the ground

• a windup spring making a toy car move across the floor

• a rubber band that is being stretched to twice its normal length

Tags

NGSS.MS-PS3-5

Which two measurements are needed to determine the speed of an object?

• distance and time

• distance and direction

• position and time

• position and direction

What describes the tendency of a moving object to continue moving at the same velocity?

• accerleration

• friction

• gravity

• inertia

What is the unit of force in the metric system?

• joule

• kilogram

• newton

• pound

Which of these is evidence that an unbalanced force is acting on an object?

• the mass of the object is changing

• the object remains at rest

• the motion of the object is changing

• the object continues moving in a straight line at constant velocity

Tags

NGSS.MS-PS2-2