Acar with a mass of 1.1 x 10^3 kilograms hits a stationary truck with a mass of 2.3 x 10^3 kilograms from the rear end. the initial velocity of the car is +22.0 meters/second. after the collision the velocity of the car is -11.0 meters/second. what is the velocity of the truck after this elastic collision? a.) +13 meters/second b.) +20 meters/second c.) 15.7 meters/second d.) +7.5 meters/second e.) +9.8 meters/second

If the collision is elastic then the momentum is preserved.

This implies that:

Where:

= automivil mass =

= mass of the truck =

= initial speed of the car = +22.0 m/ s

= initial speed of the truck = 0

= final speed of the car = -11.0 m/ s  

= Final speed of the truck =?

Then we clear vft

The answer is the sentence C...

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge