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3 years ago

PLEASE ANSWER THIS RIGHT ASAP

Physics

1 answer:

levacccp [35]3 years ago

8 0

Answer:

D: The ability to do work or cause change.

Explanation:

Energy can be defined as the ability to do work. We apply energy in basically everything we do in life, energy is needed to walk or move from one position to another, it is required to eat and do other basic things of life. The body system converts the food that is being consumed into energy, this energy can be switched from one form to another.

There are various forms of energy which include solar energy, wind energy, electrical energy, mechanical energy, kinetic energy, potential energy, etc. This form of energy can be converted from one form to another but cannot be destroyed.

Hope this helps :)

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The fire alarm goes off, and a 75 kg firefighter slides down a pole with a constant acceleration of a = 6 m/s square. What is th

Alex17521 [72]

Answer:

450N

Explanation:

Given data

Mass m= 75kg

Acceleration= 6m/s^2

From the Newtons first law, F=ma

substitute

F=75*6

F= 450N

Hence the force is 450N

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3 years ago

a train travels 81 kilometers in 2 hours and then 88 kilometers in 2 hours what is its average speed

Blababa [14]

Average speed = total distance / total time

= (81 + 88) / (2 + 2)

= 169/4

= 42.25 kilometers/hour

Let me know if you have any questions.

4 0

3 years ago

The purpose of a generator is to convert mechanical energy into which of the

Alex17521 [72]

Answer:

C. Electric energy

Explanation:

A generator is designed to convert chemical energy to mechanical energy and them electrical energy.

It is an alternate source of electricity for most homes and industrial establishments.
The source of energy for the generator is a fuel usually fossil fuels.
This energy source is ignited and it produces heat energy which drives the motion of the pistons in the set.
As the piston moves, an magnetic field is cut through by a conducting wire.
This inducts the production of currents.

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3 years ago

A speed skater just finished a race. After she crossed the finish line, she coasted to a complete stop. If her initial speed was

romanna [79]

Answer:

5seconds

Explanation:

because she was going through the same time

6 0

2 years ago

A baseball player slides into third base with an initial speed of 4.0 m/s . if the coefficient of kinetic friction between the p

satela [25.4K]

The work done by the friction force to stop the player is equal to his loss of kinetic energy:
$W= \Delta K$

The work done by the friction force is the magnitude of the force $\mu m g$ times the distance covered by the player, d:
$W= \mu mg d$

The loss in kinetic energy is simply equal to the initial kinetic energy of the player, since the final kinetic energy is zero (the player comes to rest):
$\Delta K=K_i = \frac{1}{2}mv^2$

Substituting into the first equation, we get:
$\mu m g d= \frac{1}{2}mv^2$
from which we find d, the distance covered by the player:
$d= \frac{v^2}{2 \mu g}= \frac{(4.0 m/s)^2}{2 \cdot 0.4 \cdot 9.81 m/s^2}=2.04 m$

4 0

3 years ago