Answer:
b
Explanation:
i took the quiz i think its right
Answer:
the force between the building and the ball is non-conservative (friction-type force)
Explanation
Explanation:For this exercise the student must create an impulse to move the ball towards the building, in this part he performs positive work since the applied force and the displacement are in the same direction.
When the ball moves it has a kinetic energy and if its height increases or decreases its potential energy also changes, but the sum of being must be equal to the initial work.
When the ball arrives and collides with the building, non-conservative forces, of various kinds; rubbing, breaking, etc. It transforms this energy into a part of heat and another in mechanical energy that the building must absorb, let us destroy its wall
Consequently, the force between the building and the ball is non-conservative (friction-type force
Answer:
Power = 13.5744 kilowatts
Explanation:
Power is the rate at which work is done. ... Great power means a large amount of work or energy developed in a short time. For example, when a powerful car accelerates rapidly, it does a large amount of work and consumes a large amount of fuel in a short time.
Formula for power = work/time
= IVT/T
= IV
Where I is the current
And V is the voltage
The voltage V supply = 168 v
The current A supply = 80.8 A
Power = 80.8*168
Power = 13574.4 watts
Power = 13.5744 kilowatts
Answer:
No Density does not depend on the amount of substance you have because density is the ratio of mass and volume in an object
Explanation:
ROCK AND ROLL!!
~Monty
Find the final velocity of the rock first:
The total energy of the rock at rest:

The total energy of the rock after 7m:

Energy must be conserved:

Momentum must be conserved also.
Momentum with the ball at rest:

The total momentum is zero with the ball at rest and must remain zero.
Momentum with the ball at 7m:

Solving for the earth's velocity v₂: