An object, initially at rest, moves with a constant acceleration of 10 m/s2. how far will it travel in (a) 2.0 s and (b) 4.0 s? if this object had an initial velocity of 4 m/s, how far will it travel in (c) 2.0 s and (d) 4.0 s?

Explanation:

Initially, the object is at rest, u = 0

Acceleration of the object,

(a) Distance travel in 2 second can be calculated using second equation of motion as :

(b) Distance travel in 4 second can be calculated using second equation of motion as :

(c) Initial velocity of the object, u = 4 m/s

(d)

Hence, this is the required solution.

that would be because of both gravity and friction. so     c