To clear a jump a skateboarder has to increase his velocity from 4 m/s to 12 meters/second. He has only 4 seconds to do it. What must his acceleration be to make this jump?

2 m/s² is the acceleration.

Explanation:

Acceleration is defined as the rate of change in velocity with respect to time.

Here the initial velocity, u = 4 m/s

   the final velocity , v = 12 m/s

time = 4 seconds

Acceleration =

Plug in the values, we will get,

Acceleration =

                  = = 2 m/s²

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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