Newtons laws

Question 1

What is Newtons first law

Answer 1

Law of inertia - ‘A body continues in a state of rest or uniform velocity unless acted upon by an external force

Question 2

Newton’s second law

Answer 2

Law of acceleration - ‘A Body’s rate of change in momentum is proportional to the size of the force applied and acts in the same direction as the force applied

Question 3

Newtons third law

Answer 3

Law of Action and Reaction - ‘ For every action force applied to a body there is an equal and opposite reaction force.

Question 4

What is velocity`

Answer 4

“…the rate of change in displacement (speed but with a directional
element).”
Displacement (the shortest straight-line route between the start and finish points)
Velocity = displacement (m) / time taken (s)
Units – metres per second (m/s)

Question 5

What is momentum

Answer 5

“…the quantity of motion possessed by a moving body”
Momentum = mass (kg) x velocity (m/s)
Measured in kilogram metres per second (kgm/s)

Question 6

What is acceleration

Answer 6

“…the rate of change in velocity.”
Acceleration = (final velocity – initial velocity) / time taken
Units m/s/s or metres per second squared