Question

a disc of mass 400gm is rolling on a horizontal surface with uniform velocity 2 m/ s calculate it's total kinetic energy​

Answer 1

Answer:

Given:

Mass=400gm

Velocity=2m/sec

We know that Kinetic Energy's formula is:

1/2Mv^2..

Then,

1/2×400×(2) ^2

=1/2×400×4

=800Joule..

Our Answer is 800Joule..

Thanks

Answer 2

Answer:

your answer is . 8J

Explanation:

KE = 1 /2 ×m×(v)2

mass = 400g

= 400 / 1000

= .4kg

velocity = 2 m/s

then,

KE = 1/2 × .4 × (2)2

= .8J

hope this would help you!!