A body of mass 2 kg is thrown upward with an initial velocity of 20m/s after 2 sec its kinetic energy will be
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mass=2kg
initial velocity(u)=20m/s
Time =2sec
First we will find its final velocity
then we will derived this on ek=1/2mvsquare formula
then we got answer....
initial velocity(u)=20m/s
Time =2sec
First we will find its final velocity
then we will derived this on ek=1/2mvsquare formula
then we got answer....
omsongh09pd706i:
hi utkarshita it's pragya here
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Given:-
Mass=2Kg
Initial velocity=20m/s
Time=2sec.
g=10m/s^2
Since,the object is thrown upward against the gravitational force of earth so ,the acceleration due to gravity will be in negative.
By ,using 1eqn.of motion..
V= u + at
V= 20 + (-10)×2
V=20-20
V=0M/s
Kinetic energy =
= 0 M/s
hence ,Kinetic energy after 2 sec. will be 0 .
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