It is the 3rd Law. Every force in nature occurs in equal measure but opposite directions
ANSWER

EXPLANATION
Parameters given:
Mass of car, mc = 1103 kg
Mass of truck, mt = 4919 kg
Initial velocity of car, uc = 18 m/s
Inital velocity of truck = 0 m/s
To solve this problem, we have to apply the law of conservation of momentum, which states that the total momentum of a system is constant.
This implies that:

Since the car and the truck stick together after the collision, they will have the same final velocity.
Hence:

Substitute the given values and solve for v (final velocity):

That is the final velocity of the two-vehicle mass.
Answer:
ummmm probably.... inaction or inactivity
Answer:
The time taken is 
Explanation:
From the question we are told that
The speed is 
The length of the tennis court 
Generally the time taken is mathematically represented as

=> 
Here Power = Voltage * Current
So, Voltage = Power/Current
Put the values,
V = 240/2
V = 120 V
In short, Your Final Answer would be: 120 Volts
Hope this helps!