Kinematics

Question 0

Center of gravity

Answer 0

The point at which the entire weight of an object can be considered to act

Question 1

Acceleration of free fall

Answer 1

(g) the acceleration of a body falling under gravity. On earth it has the value of 9.81ms-2

Question 2

Elastic potential energy

Answer 2

The energy stored in a stretched it compressed object (for example a spring), measured in joules (J) ; a scalar quantity

Question 3

Gravitational potential energy

GPE

Answer 3

The energy stored in an object( the work an object can do ) by virtue of the object being in a gravitational field, measured in joules (J); a scalar quantity.

Question 4

Moment of a force

Answer 4

The turning effect due to a single force, calculated form the force multiplied by the perpendicular distance form a given point ,measured in newton meters(N m)
Eg. 4Nm ; a vector quantity

Question 5

Principle of moments

Answer 5

For a body in rotational equilibrium the sum of the clockwise moments equals the sum of the antilock wise moments

Question 6

Stopping distance

Answer 6

The sum of the thinking distance and the braking distance (I.e the total distance required to stop a vehicle from seeing the need to stop to vehicles becoming stationary

Question 7

Torque

Answer 7

The turning effect due to a couple,measured in Newton meters (Nm)

Question 8

Young modulus

Answer 8

(Y) the ratio between stress and strain , measured in pascals (Pa)