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Kisachek [45]
3 years ago
7

Can kintic friction affect mechanical energy

Physics
1 answer:
Nesterboy [21]3 years ago
3 0
Yes. Kinetic energy is a form of mechanical energy and friction will turn that kinetic energy into heat.
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A student drops a ball from the top of a tall building; it takes 2.9 s for the ball to reach the ground.
AlexFokin [52]

<h2><u>We have</u>,</h2>

  • Initial velocity (u) = 0 m/s
  • Time taken (t) = 2.9s
  • Acceleration due to gravity (g) = + 10 m/s² [Down]

<h2><u>To calculate</u>,</h2>

  • Final velocity (v)
  • Height (h)

<h2><u>Solution</u><u>,</u></h2>

→ v = u + gt

→ v = 0 + 10(2.9)

→ v = 29 m/s \qquad … ( Ans )

And,

→ h = ut + ½gt²

→ h = 0(2.9) + ½ × 10 × (2.9)²

→ h = 5 × 8.41

→ h = 42.05 m \qquad … ( Ans )

4 0
2 years ago
Surrounding a magnet is a magnetic field. Surrounding an electron is an electric field. Surrounding Earth is
trasher [3.6K]

Answer: B. A gravitational field

Explanation:

Surrounding earth is gravitational field. Gravitational field is a region of space were gravitational force can be felt and gravitational force is the gravitational pull on the surface of the earth. The presence of this gravity is what allow us to be able to walk freely without falling. It also make us jump up and be able to land back on the ground. Assuming there are no force of gravity in the surface of the earth, there won't be any possibility of landing back on the ground after jumping.

6 0
3 years ago
The diagram below shows the movement of matter in a portion of the water cycle.
Alisiya [41]

Answer:

d) precipitation

Hope it helps you

And if you want to, pls mark it as the brainliest answer

7 0
3 years ago
Including a full-wave rectifier in an AC circuit will yield a(n) _______ current
nydimaria [60]
The answer is c. Continuous direct
8 0
4 years ago
Read 2 more answers
2 decimeters expressed in millimeters
Alenkinab [10]
Hi!
1 decimeter = 100 millimeters.
Therefore 2 decimeters = 200 millimeters.
3 0
3 years ago
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