Question

kinetic energy of an object of mass 2kg moving with a speed of 3m/s and the potential energy of an object of mass 500g at a height of 20m are respectively (acceleration due to gravity is 10m/s^2)


Pls urgent

Answer 1

Explanation:

Answer:

K.E. = 9 J

P.E. = 100 J

Explanation:

Given :

Mass m = 2 kg

Velocity v = 3 m / sec

Now kinetic energy is given as :

= > K.E. = 1 / 2 m v²

= > K.E. = 1 / 2 × 2 × 3² J

= > K.E. = 9 J

Now :

Mass m' =500 g = 0.5 kg

Height h = 20 m

Acceleration due to gravity g = 10 m / sec²

We know potential energy is given as :

= > P.E. = m g h

= > P.E. = 0.5 × 10 × 20 J

= > P.E. = 100 J

Hence we get required answer!

Answer 2

Answer:

> K.E. = 1 / 2 m v²

= > K.E. = 9 J

= > P.E. = 0.5 × 10 × 20 J

= > P.E. = 100 J