Mech

Question 1

Formulate Work Done

Answer 1

Force * Distance

Question 2

Formulate Power

Answer 2

Work Done / Time
Force * Velocity

Question 3

When is an object at its maximum speed

Answer 3

Acceleration = 0

Question 4

Formulate Impulse

Answer 4

Force * time in which it acts
mv - mu where v is final velocity and u is inital velocity

Question 5

What is the total change in momentum

Answer 5

Impulse

Question 6

Formulate Momentum

Answer 6

Mass * Velocity

Question 7

Coefficient of restitution is 1 and 0?

Answer 7

e = 0, no kinetic energy is preserved, objects coalese, inelastic
e = 1, all kinetic energy is preserved, elastic

Question 8

Formulate Coefficient of restitutions

Answer 8

Vb - Va / Ua - Ub

Question 9

How is a moment calculated

Answer 9

Force * perpendicular distance

Question 10

What two techniques can be used when working with moments

Answer 10

• Resolving forces
• Taking moments about points

Question 11

What is a couple

Answer 11

• A pair of forces of equal magnitude acting in different directions
• Their resultant force is 0 but will have a turning affect

Question 12

How is the total moment of a couple calculated

Answer 12

Force * distance between the two forces

Question 13

When taking moments what is negative and what is positive

Answer 13

Clockwise - Negative
Anti Clockwise - Positive