Question

4. The diagram given below shows a ski jump. A skier
weighing 60 kgf stands at A at the top of ski jump.
He moves from A and takes off for his jump at B.
A
75 m
15 m
Fig. 2.20
(a) Calculate the change in the gravitational
potential energy of the skier between A and B.
(b) If 75% of the energy in part (a) becomes
kinetic energy at B, calculate the speed at
which the skier arrives at B.
(Take g =
8 = 10 m s-2)
Ans. (a) 3.6 x 104 J (b) 30 m s-1

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Answer 1

Answer:

a)3600

b)1.5

I got b as 1.5 but in your answer they gave 30m/s please take a note of it