A boy of mass M stands on a platform of radius R capable to rotate about its axis. The moment of inertia of the platform is I. The system is at rest. The friend of the boy throws a ball of mass m with a velocity v horizontally. The boy on the platform catches it. Find the angular velocity of the system in the process.

A boy of mass M stands on a platform of radius R capable to rotate abo

1.	A boy of mass M stands on a platform of radius R capable to rotate about its axis. The moment of inertia of the platform is I. The system is at rest. The friend of the boy throws a ball of mass m with a velocity v horizontally. The boy on the platform catches it. Find the angular velocity of the system in the process.
Answer» A boy of mass $M$ stands on a platform of radius $R$ capable to rotate about its axis. The moment of inertia of the platform is $I$ . The system is at rest. The friend of the boy throws a ball of mass $m$ with a velocity $v$ horizontally. The boy on the platform catches it. Find the angular velocity of the system in the process.

Discussion

No Comment Found

Related InterviewSolutions

Two speakers S1 and S2 are derived from the same amplifier and placed at the same distance from x-axis as shown in figure. The speakers vibrate in phase at 680 Hz. A man stands at a point on the x-axis at a very large distance from the origin and starts moving parallel to the y-axis. The speed of sound is 340 m/s. Then, at what angle θ with the x− axis will the intensity of sound drop to a minimum for the first time?
A body started with velocity of 12 m/s and moving with an acceleration of 2 m/s2. The distance travelled by the body in the 8th second is
When the two identical cells are connected either in series or in parallel across a 4 ohm resistor they send the same current through it. The internal resistance of the cell is
A heavy particles is suspended by a string of length l from a fixed point O. The particle is given a horizontal velocity v0 the string slack at some angle and the particle proceeds on a parabola. Find the value of v0 if the particle passes through the point of suspension.
A flywheel is rotating about a fixed axis passing through its COM. It has a kinetic energy of 420 Joules when its angular speed is 20 rad/s. The moment of inertia of the wheel about the fixed axis is
A siren placed at a railway platform is emitting sound of frequency 5 kHz. A passenger sitting in a moving train A, records a frequency of 5.5 kHz while the train approaches the siren. During his return journey in a different train B, he records a frequency of 6.0 kHz while approaching the same siren. The ratio of the velocity of train B to that of train A is
One fourth length of a uniform rod of length 2l and mass m is placed on a horizontal table and the rod is held horizontal. The rod is released from rest. Find the normal reaction on the rod as soon as the rod is released
A force F=(5√3^i+5^j) N is acting on a body at point (1,1)m. Calculate torque of this body w.r.t to point (1,0) m
Two bodies of masses 3 kg and 5 kg are moving with velocities 25 m/s and 15 m/s towards each other due to mutual force of attraction as shown in the figure. What is the velocity of their center of mass?
The capacitance of a parallel plate air condenser is 2 μ F. A dielectric of constant 4 is introduced as shown in the figure to fill half the space between the parallel plates. Its capacitance now will be?

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment