Newton's Laws and Momentum

Question 1

What is Newton’s First Law?

Answer 1

An object will remain at rest or move in a straight line with a constant speed unless acted on by an external force

Question 2

What is Newton’s Second Law?

Answer 2

The rate of change of momentum of a body is proportional to the force applied to that body and in the direction of the force
Force = mass x acceleration

Question 3

What is Newton’s Third Law?

Answer 3

Every force between a pair of bodies acts on both, in opposite directions

Question 4

What type of quantity is momentum?

Answer 4

Vector

Question 5

What is the equation for momentum?

Answer 5

Momentum (kgms-1) = mass (kg) x velocity (ms-1)

P = mv

Question 6

What is is conserved in Elastic collision?

Answer 6

Ek and momentum

Question 7

What is is conserved in Inelastic collision?

Answer 7

Momentum

Ek isn’t

Question 8

What is Impulse?

Answer 8

The product of the force and the time which the force acts for

Question 9

What is the equation for Impulse?

Answer 9

Impulse (j) = F/\t = /(mv)

Question 10

What does the area under the Ft graph show?

Answer 10

Change of momentum

Question 11

What is Ns the same as?

Answer 11

kg ms-1

Question 12

Is direction important for momentum, if so why, and how is it show?

Answer 12

Yes
Momentum is a vector
use (+/-) to show