The ends of a rod AB which is 5 m long moves along two grooves OX, OY which at the right angles. If A moves at a constant speed of `1/2m//sec`, what is the speed of B, when it is 4m from O?

Suppose a boy is enjoying a ride on a marry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is:

An explosion breaks a rock into three parts in a horizontal plane two of them go off at right angles to each other the first part of mass 1 kg moves with a speed of 12 m/s the second part of mass 2kg moves with a speed of 8 m/s and the third aprt flies off with a speed of 4 m/s calculate the mass of third part

The length of the rod placed inside a rocket is measured as 1m by an observer inside the rocket which is at rest. When the rocket moves with a speed of 36 xx 10^(6) km//hr the length of the rod as measured by the same observer is :

Find the mass of a body which has 5J of kinetic energy while moving at a speed of 2m/s (AS_(1))

A man is moving away from a tower 41.6 m high at the rate of 2 m/sec. Find the rate at which the angle of elevation of the top of tower is changing, when he is at a distance of 30m from the foot of the tower. Assume that the eye level of the man is 1.6m from the ground.

Figure shows as rod of length 20 cm pivoted near an end and which is made to rotate in a horizontal plane with a constant angular speed. A ball ofmass m is spuspended by a string angular also of length 20 cm from the other end of the rod. If the angle theta made by the stirng with the vertical is 30^0 . find the anglular speed of the rotation. Take g=10 m/s^2

A sound source, fixed at the origin, is continuously emitting sound at a frequency of 660 Hz. The sound travels in air at a speed of 330 ms^-1 . A listener is moving along the line x = 336 m at a constant speed of 26 m Find the frequency of the sound as observed by the listener when he is a. at y=-140m, b. at y=0 and c. at y=140m .

A block of mass m slides along a frictionless surface as shown in the figure. If it is releases from rest from A what is its speed at B?

If a stone tied at the one end of a string of length 0.5 m is whirled in a horizontal circle with a constant speed 6 ms^(-1) , then the acceleration of the stone is