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Lelu [443]
3 years ago
5

3. You raise a bucket of water from the bottom of a deep well. If your power output is 100 W, and the mass of the bucket and the

water in it is 4.00 kg, with what speed can you raise the bucket? Ignore the weight of the rope.
Physics
1 answer:
Olenka [21]3 years ago
3 0

Answer:

2.55 m/s

Explanation:

The power output can be rewritten as:

P=Fv (1)

where

F is the force applied

v is the speed at which the bucket is raised

If we want to raise the bucket at constant speed, we must apply a force equal and opposite to the weight of the bucket, which is equal to the product between its mass (4.00 kg) and the gravitational acceleration (9.8 m/s^2):

F=mg=(4.00 kg)(9.8 m/s^2)=39.2 N

We know that the power output is P = 100 W, so we can re-arrange eq.(1) to find the speed:

v=\frac{P}{F}=\frac{100 W}{39.2 N}=2.55 m/s

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a ball is thrown striaght up in the air and then falls back to earth. if the downward fall takes 2.2s, how fast is the ball trav
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The velocity of the ball when it strikes the ground, given the data is 21.56 m/s

<h3>Data obtained from the question</h3>

From the question given above, the following data were obtained:

  • Time to reach ground from maximum height (t) = 2.2 s
  • Initial velocity (u) = 0 m/s
  • Acceleration due to gravity (g) = 9.8 m/s²
  • Final velocity (v) =?

<h3>How to determine the velocity when the ball strikes the ground</h3>

The velocity of the ball when it strikes the ground can be obtained as illustrated below:

v = u + gt

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Learn more about motion under gravity:

brainly.com/question/22719691

#SPJ1

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