Mechanics

Question 1

Momentum Equation

Answer 1

𝞺 = mv

Question 2

Impulse Equation

Answer 2

I = Ft

Question 3

Impulse-Momentum principle

Answer 3

Impulse = Final Momentum - Initial Momentum
I = mv - mu

Question 4

Conservation of momentum

Answer 4

Total Momentum Before Collision = Total Momentum After Collision
m₁v₁ + m₂v₂ = m₁u₁ + m₂u₂

Question 5

Work Done Equation

Answer 5

Work Done = Force x Distance
Force and Distance have to be in the same direction

Question 6

Work Done against gravity

Answer 6

Work = mgh

Question 7

Kinetic Energy Equation

Answer 7

E = ½mv²

Question 8

Potential Energy Eqaution

Answer 8

E = mgh

Question 9

Principle of Conservation of Mechanical Energy

Answer 9

When no external forces act on an object during motion, the sum of the particles potential and kinetic energy remains constant.

Question 10

Work-Energy principle

Answer 10

The change in the total energy of a particle is equal to the work done on the particle.

Question 11

Power Equation

Answer 11

Power is the rate of work done.
P = W/t
P = Fv

Question 12

Newton’s Law of Restitution

Answer 12

e = Seperation / Approach
0 ⪕ e ⪕ 1

Question 13

Loss of Kinetic Energy in a Impact

Answer 13

Kinetic Energy Before - Kinetic Energy After
(½m₁u₁ + ½m₂u₂) - (½m₁v₁ + ½m₂v₂)