Test- Unit 7 Energy

Question 1

5. Where is the greatest kinetic energy?

Answer 1

At the bottom

U7 C2- conservation of energy pg. 11

Question 2

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

Answer 2

Increases

U7 C4- Work and Power pg. 27

Question 3

9. Energy transformations: a piano would be an example of

Answer 3

Kinetic to sound

U7 C2- conservation of energy pg. 11

Question 4

10. A medicine ball has 10J of energy and is thrown upward with a velocity of 2m/s. What is its mass

Answer 4

5kg

U7 C2- conservation of Energy pg. 12

Question 5

14. When an object is dropped what happens to potential and kinetic energy as it falls?

Answer 5

GPE goes down, KE goes up

U7 C2- Conservation of Energy pg. 11

Question 6

20. Where is the greatest point of GPE?

Answer 6

At the top

U7 C2- conservation of energy pg. 11

Question 7

24. The kinetic energy of an object increases as its ________ increases

Answer 7

Velocity

U7 C1- Nature of Energy pg. 2

Question 8

26. Thermal energy is transferred from the sun to the solar panel by

Answer 8

Radiation

U7 C3- thermal energy pg. 19

Question 9

35. What shows thermal energy transfer by convection?

Answer 9

Stovetop to kettle

U7 C3- thermal energy pg. 19

Question 10

38. The________ energy of an object increases with its height.

Answer 10

Gravitational potential energy

U7 C1- Nature of Energy pg. 3

Question 11

39. Conduction is the transfer of heat energy by_______

Answer 11

Direct particle contact

U7 C3- Thermal Energy pg. 19

Question 12

43. The mechanical energy of a coconut falling from a tree______.

Answer 12

Remains constant

U7 C2- Conservation of Energy pg. 11

Question 13

What is the unit for power?

Answer 13

J/s