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#1 | Work: Definition
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Concept of work
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The driver of a car travelling at velocity v suddenly see a broad wall in front of him at a distance d. He should 

(1) Brake sharply

(2) Turn sharply

(3) (1) and (2) both

(4) None of the above

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#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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Work done by a frictional force is

(1) Negative

(2) Positive

(3) Zero

(4) All of the above

Concept Videos :-

#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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A block of mass 50 kg slides over a horizontal distance of 1 m. If the coefficient of friction between their surfaces is 0.2, then work done against friction is 

(1) 98 J

(2) 72J

(3) 56 J

(4) 34 J

Concept Videos :-

#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is mv2r and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle

(a)       mv2πr2                   (b) Zero                         

(c)       mv2r2                   (d)πr2mv2

Concept Videos :-

#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is mv2r and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle

(1) mv2πr2

(2) Zero

(3) mv2r2

(4) πr2mv2

Concept Videos :-

#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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A man pushes a wall and fails to displace it. He does 

(1) Negative work

(2) Positive but not maximum work

(3) No work at all

(4) Maximum work

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#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is

(1) 0°

(2) 30°

(3) 60°

(4) 90°

Concept Videos :-

#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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A force F=(5i^+3j^) newton is applied over a particle which displaces it from its origin to the point r=(2i^1j^)  metres. The work done on the particle is 

(1) – 7 joules

(2) + 13 joules

(3) + 7 joules

(4) + 11 joules

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#1 | Work: Definition
#2 | Solved Problems

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Concept of work
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The work done in pulling up a block of wood weighing 2 kN for a length of 10m on a smooth plane inclined at an angle of 15° with the horizontal is 

(1) 4.36 kJ

(2) 5.17 kJ

(3) 8.91 kJ

(4) 9.82 kJ

Concept Videos :-

#1 | Work: Definition
#2 | Solved Problems

Concept Questions :-

Concept of work
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