Question

determine the momentum of a 0.45 caliber bullet (m= 0.162 kg) leaving the muzzle of a gun at 850 m/s

determine the momentum of a 100-kg professional fullback running across the line at 9.0 m/s

a bicycle has a momentum of 20 kg*m/s. what momentum would the bicycle have if it had the same mass and was moving with twice the speed?

a bicycle has a momentum of 20 kg*m/s. what momentum would the bicycle have if it had one-half the mass and was moving with twice the speed?

a bicycle has a momentum of 20 kg*m/s. what momentum would the bicycle have if it had the same mass and was moving with one half the speed?

Answer 1

a)

Momentum is given by

P=mV =0.162*850=137.7 Kg-m/s

b)

P=100*9=900 Kg-m/s

c)

=>P₂/P₁=V₂/V₁

P₂/20 =(2V/V)

P₂=40 Kg-m/s

d)

P₂/P₁=(m₂/m₁)(V₂/V₁)

P₂/20 =(m/2/m)(2V/V)=1

P₂=20 Kg-m/s

e)

P₂/P₁=V₂/V₁

P₂/20 =(V/2/V)=1/2

P₂=10 Kg-m/s