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A mass of 100 g strikes the wall with speed `5 m//s` at an angle as shown in figure and it rebounds with the same speed it the contact time is `2 xx 10^(-3) sec`. What is the force applied on the mass by the wall : A. `250 sqrt(3)` to rightB. 250 N to rightC. `250 sqrt(3) N` to leftD. 250 N to left |
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Answer» Correct Answer - C `F_(x)=(Delta P_(x))/(Delta t)=((P f_(x)-P i_(x)))/(Delta t)` `=(-mV sin 60^(@) -(mV sin 60^(2)))/(2 xx10^(-3))=-250 sqrt(3)N` `= 250 sqrt(3) N` towards left. |
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