Home
Class 12
PHYSICS
A man of mass m starts moving on a plank...

A man of mass `m` starts moving on a plank of mass `M` with constant velocity `v` with respect to plank. If the plank lies on a smooth horizontal surface, then velocity of plank with respect to ground is

A

`(Mv)/(m+M)`

B

`(mv)/(M)`

C

`(Mv)/(m)`

D

`(mv)/(m+M)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

A man of mass m moves on a plank of mass M with a constant veloicty u with respect to the plank, as shown in figure. a.If the plank rest on smooth horizontal surface, determine the velocity of the plank. b If the man travels a distasnce L with respect to the plank, find the distance travelled by the plank with respect to te ground.

A man of mass 50 kg is runing on a plank of mass 150 kg with speed of 8 m//s relative to plank as shows in the figure (both were initially at rest and velocity of man with respect to ground any how remains constant). Plank is placed on smooth horizontal surface. The man, while runing, whistle with frequency f_(o) . A detected (D) placed on plank detects frequency. The man jumps off with same velocity (w.r.t. to groung) from point D and slides on the smooth horizontal surface [Assume coefficient of friction between man and horizontal is zero]. The speed of sound in still medium is 330 m//s . Answer the following questions on the basis of above situations. The frequency of sound detected by detector D , before man jumps of the plank is

A man of mass m is moving with a constant acceleration a w.r.t plank is .The plank less on a smooth horizontal floor If the mass of plank m then calculate the acceleration of plank and man w.r.t ground and frictional force extended by plank on man

A man of mass m is moving with a constant acceleration a w.r.t. plank. The plank lies on a smooth horizontal floor. If mass of plank is also m then the frictional force exerted by plank on man is ma/k. Find the value of k.

A plank is moving on ground with a velocity v and a block is moving on the plank with respect to it with a velocity u as shown in figure. What is the velocity of block with respect to ground ?

A sphere of mass m is given some angular velocity about a horizontal axis through the center, and gently placed on a plank of mass m . The coefficient of friction between the two is mu . The plank rests on a smooth horizontal surface. The intial acceleration of the sphere relative to the plank will be:

A sphere of mass m and radius r is placed on a rough plank of mass M . The system is placed on a smooth horizontal surface. A constant force F is applied on the plank such that the sphere rolls purely on the plank. Find the acceleration of the sphere.

No external force: Stationery mass relative to an inertial frame remains at rest A man of mass m is standing at one end of of a plank of mass M. The length of the plank is L and it rests on a frictionless horizontal ground. The man walks to the other end of the plank. Find displacement of the plank and man relative to the ground.

A sphere of mass m is given some angular velocity about a horizontal axis through its centre and gently placed on a plank of mass 'm'. The co-efficent of friction between the two is mu . The plank rests on a smooth horizontal surface. The initial acceleration of the centre of sphere relative to the plank will be