Question

find the kinetic energy of a cricket ball of mass 500g moving at a speed of 30cm/s. Find the kinetic energy in SI unit
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Answer 1

Answer:

K.E.=1/2 mv^2

K.E.=1/2 ×500/1000 ×(30/100)^2

K.E.=1/2 ×1/2 × (.3)^2

K.E.=1/4×.09

K.E.=.0225J

Answer 2

Explanation:

Mass of cricket ball = 500 g = 0.5 kg

Speed of cricket ball = 30 cm/s =0.3 m/s

Kinetic Energy = 1/2 ×mv^2

= 1/2× 0.5 ×( 0.3)^2

=1/2× 5/10 ×3/10×3/10

=0.0225J