Work, Power and EnergyHard
Question
The energy required to accelerate a car from rest to 10 m/s is W. The energy required to accelerate the car from 10 m/s to 20 m/s :-
Options
A.W
B.2W
C.3W
D.4W
Solution
By work energy theorom
W =
m [(10)2 - 0] = 50 m
again W′ =
m [(20)2 - (10)2] = 150 m = 3W
W =
m [(10)2 - 0] = 50 magain W′ =
m [(20)2 - (10)2] = 150 m = 3WCreate a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet...One mole of an ideal gas expands adiabatically from T1 to temperature T2. Then work done by the gas is :-...During melting of a ice slab at 273 K at atmospheric pressure:...Two similar springs P and Q have spring constants KP and KQ, such that KP > KQ. The are stretched, first by the same ...Given below are two statements :Statement I: An object moves from position $r_{1}$ to position $r_{2}$ under a conservat...