Home
Class 11
PHYSICS
A trolley of mass 200 kg moves with a un...

A trolley of mass 200 kg moves with a uniform speed of 36km/h on a frictionless track. A child of mass 20kg runs on the trolley from one end to the other (10 m away) with ia speed of `4ms^(-1)` relative to the trolley in a direction oppostie to the its motion. and jumps out of the trolley. What is the final speed of the trolley? How much has the trolley moved from the time the child begins to run?

A

`0.8 m"/"s`

B

`0.4 m"/"s`

C

`1.6 m"/"s`

D

`2.2 m"/"s`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A trolly of mass 200kg moves with a uniform speed of 36 km // h on a frictionless track. A child of mass 20kg runs on the trolly from one end to the other (10m away) with a speed of 4m//s relative to the trolly in a direction opposite to the trolly's motion and jumps out of the trolly. How much has teh trolly moved from the time the child begins to run ?

A trolley of mass 300 ks carrying a sand bag of 25 kg is moving uniformly with a speed of 27km//h on a frictionless track. After a while, sand starts leaking out of a hole on the trolley's floor at the rate of 0.05kgs^(-1) . What is the speed of the trolley after the entire sand bag is empty ?

A body of mass 10 kg moving at a height of 2 m, with uniform speed of 2 m/s. Its total energy is

A man of mass 80 kg is riding on a small cart of mass 40 kg which is rolling along a level floor at a speed 2 m/s . He is running on the cart , so that his velocity relative to the cart is 3 m/s in the direction opposite to the motion of cart . What is the speed of the centre of the mass of the system ?

A girl of mass 25 kg running with a speed of 1*5 m/s jumps on a skateboard of mass 2 kg kept on a surface . What will be their combined velocity ?

A cart A of mass 50 kg moving at a speed of 20 km/h hits a lighter cart B of mass 20 kg moving towards it at a speed of 10 km/h. The two carts cling to each other. Find the speed of the combined mass after the collision.

A smooth rod length l is kept inside a trolley at an angle theta as shown in the figure. What should be the acceleration a of the trolley so that the rod remain in equilibrium with respect to it?

A child is standing at one end of a long trolley moving with a speed v on a smooth horizontal track. If the child starts running towards the other end of the trolley with a speed u, the centre of mass of the system (trolley + child) will move with a speed :

A child is standing at one end of a long trolley moving with a speed v on a smooth horizontal track. If the child starts running towards the other end of the trolley with a speed u, the centre of mass of the system (trolley + child) will move with a speed :

A monkey of mass 20 kg rides on a 40 kg trolley moving at a constant speed of 8 m/s along a horizontal track. Frictional force can be neglected. If the monkey jumps vertically, with respect to the moving trolley, the catch the overhanging branch of tree, the speed of the trolley after the monkey has jumped off is :-