a)
K.E = 1/2mv2
K.E = 1/2 * 53 * 7.52
K.E = 1490.625 J
and
Gravitational potential energy = 0 J
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b)
K.E ( max height) = 0 J
Gravitational potential energy = 1490.625 J
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c)
1/2mv12 + mgy1 = 1/2mv22 + mgy2
y2 = y1 + (( v12 - v22 ) / 2g )
y2 = 0 + ((7.52 - 0) / 2 * 9.8)
y2 = 2.87 m
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(d)
just use kinematics
v2 = sqrt ( v12 + 2g ( y1 - y2))
v2 = sqrt ( 7.52 - 2 * 9.8 * 0.5 *2.87)
v2 = 5.3 m/s
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