7. Newton’s laws (3.5)

Question 1

Newton’s first law definition

Answer 1

An object will remain at rest or continue at constant velocity unless an external force acts on it.

Question 2

Newton’s 2nd law definition:

Answer 2

The net force acting on an object is directly proportional to its rate of change of momentum, and is in the same direction.

Question 3

Newton’ 3rd law definition

Answer 3

When two objects interact, they exert equal and opposite forces on each other

Question 4

Formula of momentum

Answer 4

p = mv

Question 5

When is F = ma applicable?

Answer 5

When the body/system has a constant mass

Question 6

What is the formula for force in terms of momentum?

Answer 6

F = delta p / delta t

Question 7

What is the formula for impulse?

Answer 7

impulse = F x delta t

Question 8

What is the area under a force-time graph equal to?

Answer 8

impulse

Question 9

What is the principle of conservation of momentum?

Answer 9

For a system of interacting objects, the total momentum in a specified direction remains constant, as long as no external forces act on the system.

Question 10

What is conserved in an elastic collision out of: KE, all E, p

Answer 10

all 3 are conserved

Question 11

What is conserved in an inelastic collision out of: KE, all E, p

Answer 11

all E, and p are conserved.
KE is not conserved

Question 12

You may be required to do 2D collision momentum calculations so look over that.