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physics p2 help...

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Abdulrab said:
sorry 4(b)I !!!
u use the equation force= (change in momentum)/time
change in momentum is [(35/1000 * 4.5) - (35/1000 * -3.5)] / 0.14
=2N
the direction of the force will be upwards as the plate exerts an upward force to push the ball
 
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Abdulrab said:
thnx alot !! i was missing the negative sign on the velocity !!
ur welcome :) do u know how to do the question ivorydale asked up here???!!?!
 
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there is a difference in extension on the upper and lower edge of the rod. The difference in thin rod is less than thick rod..nd hence...it can bend more!
 
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