What is the velocity of mass of 100 g having K . E of 40 J ?

1.	What is the velocity of mass of 100 g having K . E of 40 J ?
Answer» Mass, m = 100G = 0.1kg Kinetic energy = (1/2)mv^2 = 20J mv^2 = 40 v^2= 40/0.1= 400 v = 20 m/s Momentum = mv = 0.1 20 = 2 kg m/s Or KE = P^2/ (2m) P^2= 2m* KE= 20.120=4 P= 2 kg m/s

Answer»

Mass, m = 100G = 0.1kg

Kinetic energy = (1/2)*mv^2 = 20J

mv^2 = 40

v^2= 40/0.1= 400

v = 20 m/s

Momentum = mv

= 0.1 * 20

= 2 kg m/s

KE = P^2/ (2m)

P^2= 2m* KE= 2*0.1*20=4

P= 2 kg m/s

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What is the velocity of mass of 100 g having K . E of 40 J ?

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