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A ball of mass 0.3 kg moving with a
speed of 6.0 ms-1 strikes a wall at an
angle of 60° to the wall. It then
rebounds at the same speed and the
same angle. It is in contact with the
wall for 10 ms. Calculate the impulse
and the average force.
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F (average) = m (vf - vi)/t
Vf =0 m/s
Vi =6 m/s
Therefore by the formula,
Favg. = m (vf - vi)/t
= 0.3 (0-6)/0.010
= - 1.8/0.010
= - 180 N
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