When at the highest position, the skater dude shown in the picture is at h1= 9.5

Question

When at the highest position, the skater dude shown in the picture is at h1= 9.5 m above ground. In the second position, he is at h2 = 6.5 m. If he starts at rest at h1, if his mass is m= 92 kg and if g =10 N/kg, what is his kinetic energy in Joules when at h2?

When at the highest position, the skater dude shown in the picture is at h1= 9.5 m above ground. In the second position, he is at h2 = 6.5 m. If he starts at rest at h1, if his mass is m= 92 kg and if g =10 N/kg, what is his kinetic energy in Joules when at h2?

Explanation / Answer

using energy conservation method,

K.E initial + P.E. initial = K.E. final + P.E. final

0 + 92 x 10 x 9.5 = K + 92 x 10 x 6.5

K = 2760 J

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