As shown in the figure below, a skateboarder starts at point A on the ramp and r
ID: 1324675 • Letter: A
Question
As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.77 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed at point A.
As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.77 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed at point A.Explanation / Answer
Here , let the initial speed be u
Using conservation of energy,
0.5mu^2 = mgh
0.5 * u^2 = 9.8 * 2.77
u = 7.37 m/s
the initial speed of skateboarder is 7.37 m/s
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