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3. Aball of mass googfall from a height of sm
cwhat is the K.E. Chen it just reaches the
ground, Cg = 90/1²)
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Answer:
hello all!!
given -
mass of ball- 200g =.2 kg
height (h)= 5 m
acceleration due to gravity (g) = 9.8m/s
initial velocity (u) = 0 m/s
Kinetic energy = 1/2 mv2. - (q)
so, final velocity = ?
according to V2 - U2 = 2gh
V2 - 0 = 2× 9.8×5
V2 = 98 m/s.
putting the value of V2 in (q)
Kinetic energy = 1/2 × .2×98
Kinetic energy = 9.8 joules (j) . thanks
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