Home
Class 11
PHYSICS
A child weighing 25 kg slides down a rop...

A child weighing 25 kg slides down a rope hanging from the branch of a tall tree. If the force of friction acting against him is 2 N , what is the acceleration of the child

A

`22.5 m//s^(2)`

B

`8 m//s^(2)`

C

`5 m//s^(2)`

D

`9.72 m//s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Neto downward force = Weight - Friction
ma = `25 xx 9.8 -2`
`implies a = (25 xx 9.8 -2)/(25) = 9.72 m//s^(2)`
Promotional Banner

Similar Questions

Explore conceptually related problems

A child weighing 25 kg slides down a rope hanging from a branch of a tall tree. If the force of friction acting against him is 200 N, the acceleration of child is (g=10 m//s^(2))

A body weighing 20 kg just slides down a rough inclined plane that rises 5 m in every 13 m. What is the coefficient of friction?

A fireman of mass 60 kg slides down a pole. He is pressing the pole with a force of 600N. The coefficient of friction between the hands and the pole is 0.5, with what acceleration will the fireman slide down (g=10(m)/(s^2) )

A monkey is decending from the branch of a tree with constant acceleration. If the breaking strength is 75% of the weight of the monkey, the minimum acceleration with which monkey can slide down without breaking the branch is

A wheel of radius R , mass m and moment of inertia I is pulled along a horizontal surface by application of force F to as rope unwinding from the axel of radius, r as shown in figure. Friction is sufficient for pure rolling of the wheel. a. What is the linear acceleration of the wheel? b. Calculate the frictional force that acts on the wheel.

A block of mass 5 kg is initially at rest on a rough horizontal surface. A force of 45 N acts over a distance of 2 m . The force of friction acting on the block is 25 N . The final kinetic energy of the block is

A rope is wound round a hollow cylinder of mass 3 kg and radius 40 cm . If the rope is pulled with a force of 30 N , what is the angualr acceleration of the cylinder ?