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Natasha2012 [34]
3 years ago
15

Tom has a mass of 50,000 g and runs up a flight of stairs 4 m high in 12.5 seconds.

Physics
1 answer:
Leya [2.2K]3 years ago
5 0

Answer:

160 watts.

Explanation:

Remark

Power = Work / Time

Work = F * d

Note: Since he is running up stairs he is doing work against gravity.

Givens

  • m = 50000 g   kg / 1000 grms
  • m = 50000 / 1000 = 50 kg
  • h = 4 m
  • time = 12.5 seconds
  • g = 10 m/s^2

Formula

  • P = W * d/t
  • W = m*g *d / t

Solution

  • P = 50kg * 10 m/s^2 * 4 m / 12.5
  • <em><u>P = 160 watts. </u></em>

<em><u></u></em>

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3 years ago
Newton
vodomira [7]

Given parameters:

Mass on earth  = 50kg

Unknown:

Mass on planet Xenon = ?

Weight on planet Xenon = ?

Mass is the amount of matter contained in a particular substance.

Weight is the force on a body and it is derived from the product of mass and acceleration due to gravity.

         Weight  = mass x acceleration due to gravity

Planet Xenon has half the gravitational force of Earth.

 This translated gives \frac{9.8}{2}   = 4.9m/s²

Now, mass is always the same every where if the amount of matter in a substance does not change.

In this problem, mass = 50kg on planet xenon.

Weight =  mass x acceleration due to gravity  = 50 x 4.9  = 245N

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4 0
4 years ago
When point charges q = +8.4 uC and q2 = +5.6 uC are brought near each other, each experiences a repulsive force of magnitude 0.6
Stella [2.4K]

Answer:

it is separated by 80 cm distance

Explanation:

As per Coulombs law we know that force between two point charges is given by

F = \frac{kq_1q_2}{r^2}

here we know that

q_1 = +8.4\mu C

q_2 = +5.6 \mu C

force between two charges is given as

F = 0.66 N

now we have

F = \frac{kq_1q_2}{r^2}

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r = 0.8 m

so it is separated by 80 cm distance

3 0
3 years ago
Read 2 more answers
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