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.
2.
3.
4.
A body starts moving from rest in straight line under a constant power source. Its displacement in time t is proportional to
(1)
(2) t
(3)
(4)
The relation between velocity (v) and time (t) is , then which one of the following quantity is constant?
1. Force
2. Power
3. Momentum
4. Kinetic Energy
A particle is moving on the circular path of the radius (R) with centripetal acceleration . Then the correct relation showing power (P) delivered by net force versus time (t) is
1. 1
2. 2
3. 3
4. 4
A body is displaced from (0,0) to (1m,1m) along the path x=y by a force . The work done by this force will be :
1.
2.
3.
4.
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.
2. Fv
3.
4. F/v
A particle moves from position to position under the action of force The work done will be
(1) 100 J
(2) 50 J
(3) 200 J
(4) 75 J
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
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)
(2)
(3)
(4)
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