Question

a body of mass5kg is projected from ground with the velocity 20 metre/ per second. find the potential & kinetic energy of body after 3 second projscted from the ground take g=n/ per sec​

Answer 1

Answer:

K.E = 6250 J & PE = 5250 J

Explanation:

v=u+at

v = 20 + 10 (3)

v = 50 m/s

K.E = ½mv²

K.E = ½(5)(50)²

KE = 6250 J

h = ut + ½ at²

h=20(3) + ½ 10 (3)²

h = 105m

P.E = mgh

P.E = 5250 J

hope it helps u