Acar traveling at 60 mph has how much more energy than a car going at 20 mph? ke increases by a factor of 1/3 1/9 3 9

9

Explanation:

The kinetic energy of a car is given by

where

m is the mass of the car

v is its speed

In this case, the kinetic energy of the car moving at 20 mph is

While the kinetic energy of the car moving at 60 mph is (assuming same mass m)

The ratio between the two kinetic energies is:

So, the faster car has a kinetic energy which is 9 times more than the slower car.

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table