Work Energy and...

A $$10$$ kkg object attached to a nylon cord outside a space vehicle is rotating at a speed of $$5 m/s$$. If the force acting on the cord is $$125 N$$ its radius of path is 

A ball falls from a height such that it strikes the floor of lift at $$10\ m/s$$, if lift is moving in the upward direction with a velocity $$1\ m/s$$ , then velocity with the ball rebounds after elastic collision will be then

The length of simple pendulum is 1 m and mass of its bob is 50 g. The bob is given sufficient velocity so that the bob describe vertical circle whose radius equal to length of pendulum. The maximum difference in the kinetic energy of bob during one revolution is.

The work done by a force $$\vec{F}=\left ( -6x^3\hat{i} \right )\ N$$ is displacing a particle from $$x=4\ m$$ to $$x=-2\ m$$ is

When a spring is stretched by a distance $$x,$$ it exerts a force given by $$F$$ $$=$$ ($$ -5x - 16x^3$$) $$N,$$ where $$x$$ is in $$m.$$ The work done, when the spring is stretched from $$0.1\ m$$ to $$0.2\ m$$ is :

A body of mass tied at the end of a strong of length $$l$$ is projected with velocity $$\sqrt{4lg}$$, at what height will it leave the circular path:

A ball of mass m approaches a wall of mass M (>> m) with the speed 4 m/s along normal to the wall. The speed of wall is 1m/s towards the ball . The speed of the ball after an elastic collision with the wall is-

Find the reading of machine. Given each box of mass$$=15 kg$$,mass of man $$ 1=30kg$$, mass of man $$2=40 kg$$ and of each weighing machine $$=5 kg$$

When a massive body suffers an elastic collision with a stationary light body, then massive body approximately comes to rest and light body- 

A particle is acted upon by a force F which varies with position x as shown in the figure. If the particle at $$x=0$$ has the kinetic energy of $$25$$ J, then the kinetic energy of the particle at $$x=16$$m is?