Question

a hammer of 2.5 kg moving with a speed of 1 metre per second strikes the head of a nail driving it 10 centimetre into the wall. find the acceleration on the hammer and impulse provided to it

Answer 1

v2 = u2 + 2as

10 cm = 0.1 m

02 = 12 + 2*a * 0.1

- 1 = 0.2 * a

-1 / 0.2 = a

a = - 5 m / s2

Impulse = Change in momentum

= m(v - u)

= 2.5 kg ( 0 - 1)

= - 2.5 kg m /s

Acceleration : - 5 m /. s2

Impulse = - 2.5 kg m / s

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