Question

An object with a mass of 2 kg is thrown upward with initial velocity of 20m/s. After 2 seconds, it's Kinetic energy will be?
g=10ms −2
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Answer 1

Hey buddy

Here is your answer

Answer 2

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 =

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

=

$\frac{1}{2} 2 \times {0}^{2}$

= 0 M/s

hence ,Kinetic energy after 2 sec. will be 0 .