If a moving object doubles its speed, how much more momentum does it have? How much more kinetic energy?

 Momentum become double.

Kinetic energy become forth times.  

Explanation:

Lets take initial speed of the moving object = v

The mass of the object = m

We know that linear momentum P is given as

P= m v

m=mass

v=speed

The kinetic energy KE is given as

From the above two equation we can say that if the velocity of the moving object get double then the linear momentum of the moving object gets double and the kinetic energy of the object gets 4th times.

Therefore

Momentum become double.

Kinetic energy become forth times.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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this is a good question! i'll do some research and come back when i have the answer!