Newtons laws

Question 1

What is inertia?
What affects inertia

Answer 1

The inertia of a body is the built-in opposition that it offers to be moved if it is at rest or has its motion changed.
The greater the weight, the greater the inertia.

Question 2

Momentum eq

Answer 2

mass x velocity

Question 3

Newtons first law

Answer 3

If a body is a rest, it remains a rest unless a resultant force acts on it.

Question 4

Newtons second law

Answer 4

The rate of change of momentum of an object is directly proportional to the resultant force that acts on the object and occurs in the direction of the force.

Question 5

Rate of change of momentum eq

Answer 5

mv-mu/t

Question 6

Eq for newtons second law

Answer 6

F= kma

Question 7

Newtons third law

Answer 7

If body A exerts a force on body b, then body b will exert an equal and opposite on body A.

Question 8

Eq for a person on a lift moving up.

Answer 8

R= mg+ma
R is lager than mg

Question 9

Eq for lift moving up but decelerating.

Answer 9

T= mg-ma
T is smaller than mg

Question 10

Eq for lift moving up and accelerating

Answer 10

T= mg+ma