Two Tiny Winy Physics Questions?

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

1) Velocity increase. It's a curve
2) Acceleration is constant.

Answer 2

Velocity is a curve period on an incline, at least up to the point where the air resistance along with the rolling resistance meets the downforce at which point it will become a straight line.
Acceleration is a constant until the same resistive forces are included so it is a straight line.

Answer 3

Fnet=ma For the object accelerating upwards, there are two forces to be drawn on your free body diagram (FBD). One is the downward force due to gravity, which is 490 N (50*9.8). The other is the upward Force which we will label F. Using F=ma, we know F=(50)(2), so the net force is equal to 100 N in the upward direction. Since the downward force is 490 N, the upward force is 590 N. Second part Use F=ma again. The frictional force works against the direction of movement in this case. Draw an arrow pointing to the left of a box labeled fs with a magnitude of 27.94 N. There is also a cord at 30 degrees to the horizontal applying a force of 90 N. All we really care about are the forces to the left and right. Using the relationship cos(30)=F/90, we know the horizontal component of the force applied by the cord is F= 77.94 N. 77.94 N - 27.94 N = 50 N, or the net horizontal force. 50N = (40 kg)(a). Solve for a, a=1.25 m/s^2

Answer 4

If friction is neglected, velocity on an incline will increase with time (the usual equation is v = v0 + at) but acceleration will be a constant.

Answer 5

1) It should be variable - acceleration will be constant, but velocity will increase. (assuming no friction)
2) constant.