Physics Help Please?

Question

Hey there,
Can anyone please answer these questions:

(1) Is velocity on an incline constant or variable?
(So my graph should be a straight line or a curve?)

(2) Is acceleration on an incline constant or variable?
(So my graph should be a straight line or a curve?)

Thank you very much.

Answer 1

It all depends on..

1. Acceleration a= 0 ; velocity V=constant
Only if sum of forces =0

2. Acceleration a=constant
If it is not the acceleration of gravity must in flux around you. Please be careful.

On the inclined plane (makes and angle A with the horizontal) the force on the body is

F= Fd - f
Fd - force due to gravity (Fd= mg sin(A))
f= force of friction (f=u mg cos(A))
of F=0 (the body moves with a constant speed a=0)
Fd=f
mg sin(A)=u mg cos(A)
u=tan(A)

otherwize

F=ma
a= [mgsin(A)- u mg cos(A)]/m
a= g(sin(A)- u gcos(A))