Newtons Laws

Question 1

Inertia

Answer 1

Resistance of any object able to any change in its motion
The tendency of objects to keep moving in a straight line at contstant speed e.g. cruise ships has a large mass so it is difficult to move, accelerate e.g.

Question 2

Forces

Answer 2

Push up or a pull acting on an object. Measured in Newtons or N. Isaac Newton came up with 3 laws of motion that describe the effect that forces have on things

Question 3

Resultant force

Answer 3

More than one force action on an object like in tug of war.
Forces act in same direction add
Opposite then subtract

Question 4

Newtons 1st Law

Answer 4

If the forces on a mass are balanced then if it at rest it stays at rest. If it is moving it keeps on moving at a constant speed in a straight line

Question 5

Newtons 2nd Law

Answer 5

Rate of change of momentum is proportional to the force applied and takes place in the direction of the force
F= m x a / t
Acceleration is directly proportional to the resulant force
If resusltant force doubles the acceleration doubles
F= resultant force
M= mass
A= acceleration

Question 6

Newtons 3rd Law

Answer 6

Interaction between 2 bodies A and B. The force exerted by body A on body B is equal and opposite to the force exerted by body B in body A
Action and reaction pair of forces are always on different objects and so never cancel out

Question 7

Mass and weight

Answer 7

Mass is a measure of how much matter or material an object has. Measured in kg
Weight is a measure of how large the force of gravity is on an object. Measured in N
W= M x gravititational field energy (N/Kg)