Mechanical Energy

Energy can cause motion. Which of the following is an example of the energy of motion?

• An oven baking bread.

• A bike being pedaled up a hill.

• A football on the ground.

• A beam of light from headlights on a car.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A ball is rolling down a hill.

At 5 meters it is going 1.2 mps

At 10 meters it is going 2.3 mps

At 15 meters it is going 4.8 mps

What is true?

• The ball went slower as it traveled.

• The speed of the ball did not change.

• The ball went faster as it traveled.

• The speed of the ball increased then decreased.

Tags

NGSS.MS-PS3-1

A book sits on a the edge of a shelf. During an earthquake the book falls off the shelf.

What type of energy did the book have when it was falling?

• Heat energy

• Energy of motion

• Electrical energy

• Light energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Brady uses a wind-up robot to show how energy can cause change.

Which of the following will NOT be changed by winding up the robot and letting it go?

• The robot's direction

• The robot’s mass

• The robot’s position

• The robot’s speed

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The track team is running a 50 meter dash in a straight line to see which runner is fastest. What is true about the runner's motion?

• They will change their direction.

• They will change their position.

• They will change their position and direction.

• They will change their weight.

Albert is walking to Marvin's house. He walks straight for 90 meters, then turns right. He walks 50 more meters and turns right again. What is True about Albert's walk?

• He changes both position and direction on his walk.

• He does not change direction but does change his position.

• He does not change his position, but changes his direction.

• He walks at a constant speed from his house to the store.

Molly is investigating motion in science class. She uses a ramp to test the speed of marbles. Which of the following is TRUE about her investigation?

• Energy is changing the marble's color

• Energy is changing the marble's mass

• Energy is changing the marble's position

• Energy is changing the marble's size

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The spinning turbine creates electrical energy.

What is the source of energy that causes the blades of the turbine to move?

• Coal

• Natural gas

• Sun’s energy

• Wind

Mechanical energy always changes an object's

• position

• direction

• position and direction

• mass

Tags

NGSS.MS-PS3-5

This is a hydroelectric power plant. What is the source of energy that generates electricity.

• The rushing water.

• The spinning turbine.

• The wind.

• Solar energy.