Year 1 - Further Mechanics

Question 1

1.1 What is the equation for momentum?

Answer 1

Momentum = mass x velocity

P = mv

Question 2

1.1 What are the equations for impulse?

Answer 2

Impulse = force x time
I = Ft

Impulse = final momentum - initial momentum (aka change in momentum)
I = mv - mu

Question 3

1.2 What does the conservation of momentum state? Give the formula for it

Answer 3

Total momentum before impact = Total momentum after impact

m1u1 + m2u2 = m1v1 + m2v2

Question 4

1.3 What type of quantities are vectors?

Answer 4

Impulse and momentum

Question 5

2.1 What is the formula for work done?

Answer 5

work done = component of force in direction of motion x distance moved in direction of force

W = Fs

Question 6

2.1 What is the formula for work done against gravity?

Answer 6

work done against gravity = mgh

W = mgh

Question 7

2.2 What is the formula for kinetic energy?

Answer 7

KE = (1/2)mv^2

Question 8

2.2 What is the formula for potential energy?

Answer 8

PE = mgh

Question 9

2.2 What is the formula for work done in terms of kinetic energy?

Answer 9

W = change in KE

= (1/2)m(v^2 - u^2) or (1/2)m(u^2 - v^2)