Work, Power and EnergyHard
Question
A body is allowed to slide down a frictionless track freely under gravity the track end in a semicircular shaped part of a diameter D. The height (minimum) from which the body must fall so that it completes the circle, is
Options
A.
B.
C.
D.
Solution
For the body to reach point B, the body must have least velocity of
at A.So for a body falling from height h.Velodcity =
= 
⇒ 2gh = 2g 
h =
Create a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
When a rubber-band is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx2 where a and b are...The near point of a person is at 1m. The power of the lens needed so that he can read at a distance of 25 cm....A sphere of mass m moving with a constant velocity collides with another stationary sphere of same mass. The ratio of ve...Length of a simple pendulum is l and its maximum angular displacement is l, then its maximum K.E. is :...Two bodies with kinetic energies in the ratio 4 : 1 are moving with equal linear momentum. The ratio of their masses is...