Forces And Newtons Laws

Question 1

What is an intertidal frame of reference

Answer 1

Inertial frame of reference is either fixed or moving with a constant velocity relative to a fixed frame see graphs

Question 2

What is linear momentum

Answer 2

Linear momentum is Mv = Mx.

Question 3

What is N1

Answer 3

N1 is if no force acts on a body, it’s velocity doesn’t change

Question 4

What is N2

Answer 4

N2 is if a force F acts on a body with momentum p, then
F = dp/dt
If f = mv, then f =ma

Question 5

What is N3

Answer 5

N3 is action and reaction forces are equal in magnitude and opposite in direction

Question 6

What is form of frictional and viscous forces

Answer 6

Form of frictional and viscous forces is:
F = -k(xx.)x.
K(xx.) > 0
Oppose direction of motion

Question 7

What is form of central forces

Answer 7

Form of central forces is:
F = k(r) * x where r = norm(x)
Act in same or opposite direction of x e.g gravity, tension