Question

a ball of mass 200g has a kinetic energy of 90J. calculate the speed of the moving ball​

Answer 1

Explanation:

we have

mass(m)=200g = 200/1000 =0.2kg

Kinetic energy E_k=90J

velocity (v) =?

Formula for Kinetic energy

$\frac{1}{2} m {v}^{2}$

90=1/2×0.2×v^2

v^2=(90×2)/0.2

=180/0.2

=900

Therefore v=√900

=30m/s

Therefore Velocity of the ball is 30m/s

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Answer 2

Answer:velocity of the ball will be 30m/sec

Explanation:

kinetic energy=1/2 ×mv^2

90J= 1/2×0.2KG×v^2

90×2/0.2=v^2

900=v^2

√900=v

30m/sec=v