A constant force F is applied on a body. The power (P) generated is related to the time elapsed (t) as [This question includes concepts from Work, Energy and Power chapter]

1. P  t2

2. P  t

3. P  t

4. P  t3/2

Subtopic:  Power |
 54%
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Mathematical Tools questions are over , now starting Work, Energy and Power questions

A body starts moving from rest in straight line under a constant power source. Its displacement in time t is proportional to

(1) t1/2

(2) t

(3) t3/2

(4) t2

Subtopic:  Power |
 58%
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The relation between velocity (v) and time (t) is vt, then which one of the following quantity is constant?

1.  Force

2.  Power

3.  Momentum

4.  Kinetic Energy

Subtopic:  Power |
 61%
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A particle is moving on the circular path of the radius (R) with centripetal acceleration ac=k2Rt2. Then the correct relation showing power (P) delivered by net force versus time (t) is 

1. 1

2. 2

3. 3

4. 4

Subtopic:  Power |
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A body is displaced from (0,0) to (1m,1m) along the path x=y by a force F=x2j^+yi^N. The work done by this force will be :

1. 43J

2. 56J

3. 32J

4. 75J

Subtopic:  Work Done by Variable Force | Work Energy Theorem | Power |
 73%
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A force F is applied on a body which moves with a velocity v in the direction of the force, then the power will be

1.  Fv2

2.  Fv

3.  F/v2

4.  F/v

 

Subtopic:  Power |
 89%
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A particle moves from position r1=3i^+2j^6k^ to position r2=14i^+13j^+9k^ under the action of force 4i^+j^+3k^N. The work done will be 

(1) 100 J

(2) 50 J

(3) 200 J

(4) 75 J

Subtopic:  Concept of Work | Work Done by Variable Force | Power |
 82%
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PMT - 2002
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An ice cream has a marked value of 700 kcal. How many kilowatt- hour of energy will it deliver to the body as it is digested 

(1) 0.81 kWh

(2) 0.90 kWh

(3) 1.11 kWh

(4) 0.71 kWh

Subtopic:  Power |
 55%
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A body of mass m accelerates uniformly from rest to v1 in time t1. As a function of time t, the instantaneous power delivered to the body is 

(1) mv1tt1

(2) mv12tt1

(3) mv1t2t1

(4) mv12tt12

Subtopic:  Power |
 54%
From NCERT
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A weight lifter lifts 300 kg from the ground to a height of 2 meter in 3 second. The average power generated by him is 

(1) 5880 watt

(2) 4410 watt

(3) 2205 watt

(4) 1960 watt

Subtopic:  Power |
 76%
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