Question

Calculate the kinetic energy of a ball of mass 0.5 kg moving with the speed of 20 m/s.

a.200 J
b.20 J
c.0.2 J
d.None of these​

Answer 1

QUESTION:-

Calculate the kinetic energy of a ball of mass 0.5 kg moving with the speed of 20 m/s.

a.200 J

b.20 J

c.0.2 J

d.None of these​

EXPLANATION:-

We know that:-

$\bf\;K.E=\frac{1}{2}mv^2$

Where.

K.E=kinetic energy

m=mass

v=velocity

SO let's put the data in the formula

K.E1=1/2×0.5×(20)²

K.E=1/2×0.5×400

K.E=200×0.5

K.E=200 J

SO the kinetic energy =200 J

SO opt(a) is required answer.

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Answer 2

QUESTION:-

Calculate the kinetic energy of a ball of mass 0.5 kg moving with the speed of 20 m/s.

a.200 J

b.20 J

c.0.2 J

d.None of these​

EXPLANATION:-

=$K.E=\frac{1}{2}MV^2$

Where.

K.E=kinetic energy

m=mass

v=velocity  

SO let's put the data in the formula

=K.E1=1/2×0.5×(20)²

=K.E=1/2×0.5×400

=K.E=200×0.5

=K.E=200 J

=SO the kinetic energy =200 J