After the crash the momentum before the crash is equal to the momentum after the crash
As we know that collision is elastic so we will have


also we can use momentum conservation



now from above two equations we will have


also we have

so both balls will separate after collision and move in opposite direction as the final velocities are opposite in sign
So correct answer will be
<em>D. The balls separate and move in opposite directions.</em>
Answer:
plastic
Explanation:
because it is an insulator that it is a poor conductor of electricity.
Hello!
Use the <u>second law of Newton:</u>
F = ma
Replacing:
F = 40 kg * 30 m/s^2
Resolving:
F = 1200 N
The force is <u>1200 Newtons.</u>
The space between the cars closes at (70+65)=135 km/hr. They collide in (405/135)=3 hours after they start moving. In 3 hours, the canary covers (100km/hr x 3)= 300 km.