A boy pulls a 5 kg block 20 metres along...

A boy pulls a 5 kg block 20 metres along a horizontal sur- face at a constant speed with a force directed 45° above the horizontal. If the coefficient of kinetic friction is 0.20, how much work does the boy do on the block?

197.50J

219.76J

162.32J

334.15J

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

WORK, POWER, AND ENERGY
RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (More than one choice correct type)|10 Videos
WORK, POWER, AND ENERGY
RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (Linked Comprehension)|9 Videos
WORK, POWER, AND ENERGY
RESNICK AND HALLIDAY|Exercise PROBLEMS|58 Videos
WAVES-I
RESNICK AND HALLIDAY|Exercise Practice Questions (Integer Type)|4 Videos

Similar Questions

Explore conceptually related problems

A boy pulls 5 kg block by 20 m along a horizontal surface at constant speed with a force directed 45^(@) above the horizontal. If the coefficient of friction is 0.2, then

A worker pushed a 23 kg block 8.4 m along a level floor at constant speed with a force directed 32^(@) below the horizontal . If the coefficient of kinetic friction between block and floor was 0.20, what were (a) the work done by the worker's force and (b) the increase in thermal energy of the block-floor system ?

A block of weight 200N is pulled along a rough horizontal surface at contant speed by a force of 100N acting at an angle 30^(@) above the horizontal. The coefficient of kinetic friction between the block and the surface is .

A wooden block of mass M resting on a rough horizontal surface is pulled with a force F at an angle  with the horizontal. If  is the coefficient of kinetic friction between the block and the surface, then acceleration of the block is -

A block of mass 5kg is on a rough horizontal surface and is at rest. Now a force of 24 N is imparted to it with negligible impulse. If the coefficient of kinetic friction is 0.4 and g=9.8m//s^(2) , then the acceleration of the block is

A block weighing 20 N rests on a horizontal surface. The: coefficient of static friction between block and surface is 0.40 and the coefficient of kinetic friction is 0.20. ( a) How large is the friction force exerted on the block? (b) How great will the friction force be if a horizontal force of 5 N is exerted on the block? (c) What is the minimum force that will start the block in motion? (d) What is the minimum force that will keep the block in motion once it has been started? (e) If the horizontal force is 10 N, what is the friction force?

A force of 10N is acting on a block of 20kg on horizontal surface with coefficient of friction mu=0.2 . Calculate the work done by the force.

A horizontal force of 20 N is applied to a block of 10 kg resting on a rough horizontal surface. How much additional force is required to just move the block, if the coefficient of static friction between the block and the surface is 0.4 ?

A block of mass 2.5 kg is pushed 2.20 m along a frictionless horizontal table by a constant force 16 N directed 45^@ above the horizontal. Determine the work done by. (a) the applied force, (b) the mormal force exerted by the table, (c) the force of gravity and (d) determine the total work done on the block.

RESNICK AND HALLIDAY-WORK, POWER, AND ENERGY-PRACTICE QUESTIONS (Single Correct Choice Type)

A 3.00 kg model rocket is launched straight up. It reaches a maximum h...
Text Solution
|
A car is traveling at 7.0 m/s when the driver applies the brakes. The ...
Text Solution
|
A boy pulls a 5 kg block 20 metres along a horizontal sur- face at a c...
Text Solution
|
A bicyclist is traveling at a speed of 20.0 m/s as the approaches the ...
Text Solution
|
A 55-kg box is being pushed a distance of 7.0 m across the floor by a...
Text Solution
|
What power is needed to lift a 49-kg person a vertical distance of 5.0...
Text Solution
|
A motorcycle ( mass of cycle plus rider = 2.50 xx 10^(2) kg ) is trave...
Text Solution
|
The initial velocity of a 4.0-kg box is 11 m/s , due west. After the b...
Text Solution
|
The graph shows how the force component F cos theta along the displac...
Text Solution
|
A small block of mass m is kept on a rough inclined surface of inclina...
Text Solution
|
A 51-kg woman runs up a flight of stairs in 5.0 s. Her net upward disp...
Text Solution
|
A particle of mass 100 g is thrown verically upward with a speed of ...
Text Solution
|
An escalator is 30.0 meters long and slants at 30.0^(@) relative to th...
Text Solution
|
Two ends A and B of a smooth chain of mass m and length l are situated...
Text Solution
|
A warehouse worker uses a forkift to lift a crate of pickles on a plat...
Text Solution
|
A uniform rope of linear mass density lambda and length l is coiled on...
Text Solution
|
A dam is used to block the passage of a river and to generate electri...
Text Solution
|
A 20-kg block attached to a spring of spring constant 5Nm^-1 is releas...
Text Solution
|
A motorist driving a 1000-kg car wishes to increase her speed from 20 ...
Text Solution
|
A skier slides horizontally along the snow for a distance of 21 m befo...
Text Solution
|