Question

A body of mass 10kg travells 40m in 20sec .Find the kinetic energy?
koi hai
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Answer 1

answer

20j

Explanation:

kinetic energy = 1/2 × mass × velocity ^2

KE = 1/2 × 10 × v^2

v = distance/time

v=40/20......v=2m/s

KE= 1/2 × 10 × 2^2

KE= 20J

HOPE IT HELPS.....PLS MARK BRAINLIEST

Answer 2

Explanation:

Given:-

mass=m= 10kg

Distance =s=40m

time=t=20s

Velocity=v=40/20=2m/s

To find:-

Kinetic energy

Solution :-

as we know

${\large{\boxed{Kinetic\:energy={\frac{1}{2}}m {v}^{2}}}}$

${:}\longrightarrow$${\frac{1}{2}}×10×{2}^{2}$

${:}\longrightarrow$${\frac {1}{{\cancel{2}}}}×10×{\cancel{4}}$

${:}\longrightarrow$$10×2$

${:}\longrightarrow$$20Joule$

${:}\longrightarrow$${\underline{\boxed{\bf{20J}}}}$