Work, Power and EnergyHard
Question
A bullet of mass 10g leaves a riffle at an initial velocity of 1000m/sec and strikes the earth at the same level with a velocity of 500 m/sec. The work in overcoming the resistance of air will be :
Options
A.500J
B.5000J
C.3750J
D.475J
Solution
Loss of kinetic energy of bullet = The wok done in over coming air resistance.
(10002 - 5002)
(1500 × 500 = 3750 J)
(10002 - 5002)(1500 × 500 = 3750 J)Create a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
Potential energy of a system comprising of point charges is U1.When a charge q is added in the system without disturbing...A mass of 12 kg at rest explodes into two pieces of masses 4 kg and 8 kg which move in opposite directions. If the veloc...A disc of mass 1·0 kg kept floating horizontally in air by firing bullets of mass 0·05 kg each vertically at it, at the ...A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the...A body is dropped from a height h. When loss in its potential energy is U then its velocity is v. The mass of the body i...