Forces And Motion

Question 1

What is the equation for weight?

Answer 1

W=mxg

Question 2

What is stopping distance made up of?

Answer 2

Thinking distance and braking distance

Question 3

What are the two equations for acceleration?

Answer 3

V2-U2=2as
(Final velocity)2 - (initial velocity)2 = 2 x acceleration x distance

A=^V/t
Acceleration = change in velocity / time

Question 4

On a velocity time graph what does the gradient mean?

Answer 4

Acceleration

Question 5

What are the typical speeds for walking, running and cycling?

Answer 5

Walking = 1.5m/s
running = 3m/s
Cycling = 6m/s

Question 6

What is the equation for work done?

Answer 6

W=Fs
Work done = force x distance

Question 7

What is the conservation of momentum?

Answer 7

In a closed system the total momentum before the event and after the event is the same

Question 8

What is the equation for momentum?

Answer 8

P=mv
Momentum = mass x velocity

Question 9

What is a contact force and what are examples of it?

Answer 9

Objects that are physically touching

• friction
• air resistance
• tension
• normal contact force

Question 10

What is a non contact force and what are examples of it?

Answer 10

Objects are physically separated

• gravitational
• electrostatic
• magnetic