A ball starts from rest. It rolls down a ramp and reaches the ground after 4 seconds. Its final velocity when it reaches the ground is 7.0 meters/second.
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u=0
v=7
t=4s
v2-u2=2as
49-0=2×10×s
s=49/20
v=7
t=4s
v2-u2=2as
49-0=2×10×s
s=49/20
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