Question

Q 20 of 60
Mark for review ☆
At what height above the ground must a
mass of 5kg be to have its PE, equal in
value to the KE possessed by it when it
moves with a velocity of 20m/s? (Assume
g=10m/5)
Clear Response

Answer 1

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Let height be h.

So, PE at that height =mgh

KE of the mass when moving with velocity 10 m/s=1/2 mv

PE=KE

mgh=1/2gv^2

Putting values we get:

10×h=50

h=5m

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