Question

A ball of mass 200g is moving with 27km/h. Calculate its kinetic energy.

Ans: Data:-
m=200g
v=27km/h=7.5m/sec
Now,
W=K.E=1/2*mv^2
=1/2*200×7.5^2
=100*56.25
=5625

Answer 1

mass= 200g
= 0.2 kg
velocity = 27km/hr
= 7.5m/sec
therefore,
K.E. = 1/2mv²
= 1/2 * 0.2 * 7.5 * 7.5 Joule
= 5.625 Joule ANS :
--------

Answer 2

Explanation:

m=200g

v= 27km/h=7.5m/sec

now

w=K.E=1/2×200×7.2^2

=100×5.625

5.625

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