Asports car traveling along a straight line increases its speed from 19.8 mi/h to 59.9 mi/h. a. what is the ratio of the final to theinitial magnitude of its momentum? b. what is the ratio of the final to the initial kineticenergy?

Answer

given,

initial speed of the car (v₁)= 19.8 mi/h

final speed of the car (v₂)= 59.9 mi/h

a) initial momentum = m v₁

                   P₁ = 19.8 m

  final final momentum = m v₂

                   P₂ = 59.9 m

      ratio =

              =

      ratio of momentum=

b) initial kinetic energy= 1/2 m v₁²

                   K₁ = 196.02 m

  final kinetic energy= 1/2 m v₂²

                   K₂ = 1794.005 m

      ratio =

              =

      ratio of Kinetic energy=

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

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