"Force and distance" are the ones among the following choices given in the question is the relationship that the inverse square proportionality in Coulomb's equation explain. The correct option among all the options that are given in the question is the third option or option "c". I hope the answer has helped you.
Answer:
To make the lifting more efficient. It lets there be less taxing and saves a ton of energy!!
Explanation:
In this question, we know that mass= 10 kg = 10 x 1000 = 10,000 g
Distance = 1 m and Time = 0.5 s
Power = Force x Velocity
Velocity = Distance / Time = 1 m / 0.5 s = 2 m/s
So, Power = Force x (Distance / Time)
But Force= Mass x Acceleration due to gravity (g)
So, Force = 10 kg x 9.8 m/s
= 98
Therefore, Power =Force x Velocity= 98 x 2 =
196 W
Answer:
The one that holds it backward will experience a greater reaction force.
Explanation:
Newtons third law of motion states that in every action there is equal and opposite reaction. The action force of making the water leave the nozzle for the firefighter who holds the hose backwards is greater than that for the fire fighter holding it straight. The water requires a a greater momentum and force to make a u-turn before leaving the nozzle. Hence the reaction force for the hose held backwards is greater