Forces and Energy

Question 1

When a force causes an object to move through a distance…

Answer 1

Work is done

Question 2

Units of force applied?

Answer 2

N

Question 3

Units of work done?

Answer 3

J

Question 4

Units of distance moved in the direction of the force?

Answer 4

m

Question 5

What’s transferred when work is done?

Answer 5

Energy

Question 6

Units of power?

Answer 6

W (watts)

Question 7

What is power?

Answer 7

The work done or energy transferred in a given time

Question 8

Units of energy transferred?

Answer 8

J

Question 9

Units of time taken?

Answer 9

s

Question 10

What’s gravitational potential energy?

Answer 10

Energy that an object has by virtue of it’s position in a gravitational field

Question 11

Units of gravitational potential energy?

Answer 11

J

Question 12

Units of mass?

Answer 12

Kg

Question 13

Units of change in height?

Answer 13

m

Question 14

Units of gravitational field strength?

Answer 14

N/Kg

Question 15

In terms of gravitational potential energy, what happens when an object is lifted vertically?

Answer 15

Work is done against gravitational force and the object gains gravitational potential energy

Question 16

What does the kinetic energy of an object depend on?

Answer 16

Its mass

Its speed

Question 17

Units of kinetic energy?

Answer 17

J

Question 18

Units of speed?

Answer 18

m/s