1.

A block of mass 500 g is at rest on a horizontal table. What steady force is required to give the block a velocity of 200 cms^(-1)in 4 s?

Answer»

SOLUTION :Use`F= ma `
` a = (V - u)/(t ) = (200 - 0)/(4) = 50 cm//s^2`
` F = 500 xx 50 =25,000 `dyne


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