Home
Class 11
PHYSICS
An object falls from a bridge that is 45...

An object falls from a bridge that is 45 m above the water. It falls directly into a small row-boat moving with constant velocity that was 12 m from the point of impact when the object was released. What was the speed of the boat ? `(g=10ms^(-2))`

A

`2m//s`

B

`3m//s`

C

`5m//s`

D

`4m//s`

Text Solution

Verified by Experts

The correct Answer is:
D

`t=sqrt(2h)/(g), s=vxxt`
Promotional Banner

Similar Questions

Explore conceptually related problems

A key falls from a bridge that is 45 m above the water. It falls directly into a model boat, moving with constant velocity, that is 12 m from the point of impact when the key is released . What is the speed of the boat ?

A key falls from a bridge that is 45 m above the water. It falls directly into a model boat, moving with constant velocity, that is 12 m from the point of impact when the key is released . What is the speed of the boat ?

A small block of wood of relative density 0.5 is submerged in water at a depth of 5 m When the block is released it starts moving upwards, the acceleration of the block is (g=10ms^(-2) )

A body falling a vertically up with initial velocity 52 m/s from the ground passes twice a point at h height above at an interval of 10 s. The height h is (g=10m//s^(2))

A man on the tower 15 metres above the water pulls in a rope, attached to a boat, at the rate of 0.8m//sec .When the boat is 8 m from the tower, it is approaching the river bank at the rate of

Find the work done of move an object of mass 3 kg to a height of 20 m from the ground (Take g =10ms^(-2) ).

A boy (mass of 40 kg) is standing at one end of a boat (mass of 60 kg) in still water. The length of the boat is 10 m and the boy takes 2s to reach at other end of boat moving with constant speed. Assuming no friction between the boat and the water. (i) The distance covered by the boat is 4 m (ii) The distance covered by the boy with respect to the ground is 6 m . (iii) The velocity of the boy with respect to the ground is lt 5 m//s (iv) The velocity of the boy is 3 m//s

An object of mass 5 kg falls from rest through a vertical distance of 20 m and reaches a velocity of 10 m/s. How much work is done by the push of the air on the object ? (g=10m//s^(2)).

An object of mass 10 kg falls from rest through a vertical distance of 10 m and acquires a velocity of 10 ms^(-1) . The work done by the push of air on the object is (g = 10 ms^(-2) )

Velocity of the boat with respect to river is 10m/s. From point A it is steered in the direction shown. Where will it reach on the opposite bank ?