SP8/9 - Forces doing work

Question 1

When is energy transferred?

Answer 1

When things happen
When forces move something

Question 2

What is work done?

Answer 2

The energy transferred by a force

Question 3

What is the equation for power?

Answer 3

work
power = ———
time

Question 4

What is the formula for work done?

Answer 4

work done = force x distance

Question 5

What are the units for work done?

Answer 5

Joules

Question 6

What are the units for power?

Answer 6

Watts

Question 7

How is the unit for power connected to the unit for energy?

Answer 7

1 watt = 1 joule/ per second

Question 8

What is the unit for force?

Answer 8

Newtons

Question 9

What is power?

Answer 9

The rate of energy transferred

Question 10

What is work done?

Answer 10

The energy transferred by a force

Question 11

What are examples of contact forces?

Answer 11

Friction
Pull
Push
Air resistance
Thrust / Upthrust
Reaction

Question 12

What are examples of non-contact forces?

Answer 12

Gravity
Weight
Magnetic
Electrostatic

Question 13

Is force a vector or scalar?

Answer 13

Vector:
It has a magnitude and direction

Question 14

What do the arrows on a free body force diagram show?

Answer 14

The direction the force is acting

Question 15

Study free body force diagrams

Answer 15

Study vector diagrams