Forum

A particle is relea...
 
Notifications
Clear all

A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively:

1 Posts
2 Users
0 Likes
202 Views
0
Topic starter

A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively:

(1) \(\frac{S}{4}\), \(\frac{3gS}{2}\)

(2) \(\frac{S}{4}\), \(\frac{\sqrt{3gS}}{2}\)

(3) \(\frac{S}{2}\), \(\frac{\sqrt{3gS}}{2}\)

(4) \(\frac{S}{4}\), \(\sqrt{\frac{3gS}{2}}\)

1 Answer
0

Correct answer: (4) \(\frac{S}{4}\), \(\sqrt{\frac{3gS}{2}}\)

Explanation:

U + KE = E

4U = E = mgS

4mgh = mgS

h = \(\frac{S}{4}\)

v = \(\sqrt{2g(\frac{3S}{4})}\)

= \(\sqrt{\frac{3gS}{2}}\)

Share:

How Can We Help?