Question

A hammer of mass 1kg falls freely frm a ht of 2m calculate
(i) The velocity and
(ii)K.E of the hammer just before it touches the ground.

Twinkle...plzzz....ans it also...
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Answer 1

Answer:

Kinematics

Explanation:

★ Given ;

» mass of hammer :- 1 kg

» Height from which hammer falls freely :- 2 m

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[ A ] Velocity

V = √ 2 × g × h

= √ 2 × 10 × 2

= √ 40

★ velocity ( v ) = 6.32 m / s .

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[ B ] Kinetic energy of hammer

KE = 1 / 2 × mass × velocity ²

= 1 / 2 × 1 kg × ( √ 40 )² m / s

= 1 / 2 × 1 × 40

★ K.E. = 20 joules