Test Unit 7- Energy

Question 1

As the time required to do a given amount of work decreases, the power developed…

Answer 1

Increases

U7C4 Notes pg.27

Question 2

At what point, when swinging a baseball bat, would have the greatest amount of kinetic energy? The baseball bat is swinging downwards so there’s when the baseball bat is resting preparing to be swung, when the baseball bat is in mid-swing, and when it’s been fully swung.

Answer 2

Mid-swing or point C

U7C2 Notes pg. 11

Question 3

The mechanical energy of a coconut falling from a tree…

Answer 3

Remains constant

U7C2 Notes pg.11

Question 4

Where would a rollercoaster have the greatest kinetic energy?
At the rising point, when it’s resting getting ready to drop, or when it’s dropping.

Answer 4

When it’s dropping

U7 C2 Notes pg.11

Question 5

At what point, when swinging a baseball bat, would have the greatest amount of gravitational potential energy? The baseball bat is swinging downwards so there’s when the baseball bat is resting preparing to be swung, when the baseball bat is in mid-swing, and when it’s been fully swung.

Answer 5

When the baseball bat is getting ready to be swung

U7C2 Notes pg.11

Question 6

When you hold an ice cube, your hand feels cold because…

Answer 6

Heat flows from your hand to the ice cube

U7C3 Notes pg.19

Question 7

When water at 10 degrees Celsius is heated to 20 degrees Celsius it’s kinetic energy….

Answer 7

Increases

U7C3 Notes pg.19