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charle [14.2K]
4 years ago
12

A construction worker pushes a wheelbarrow 5.0 m with a horizontal force of 50.0 N. How much work is done by the worker on the w

heelbarrow
Physics
2 answers:
Ostrovityanka [42]4 years ago
7 0
Work Done = force • distance
Work Done = 5m • 50N
Work Done = 250J

Answer: 250 Joules
leonid [27]4 years ago
4 0

Answer: 250 J

Explanation:

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A diver, of mass 40kg, climbs up to a diving platform 1.25m high. What’s her KE
Leona [35]

Explanation:

The formula for KE ( Kinetic Energy ) is : 1/2 mv²

Solution:

  • First we solve for v ( velocity ) using the formula 2gh, where g is gravity [ 9.8 m/s² ] and h is height [ 1.25 m ]

= 2 ( 9.8 m/s² × 1.25 m ) = 24.5 m/s

  • The velocity is 24.5 m/s.

  • Now solve for KE using the formula 1/2 mv²

= 1/2 ( 40 kg × 24.5m/s ² )

= 1/2 ( 40 kg × 600.25 )

= 1/2 ( 24,010 )

= 12,005 Joules

  • The diver's kinetic energy is 12,005 J.

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2 years ago
Earth’s orbital speed is approximately _____. 1600 kilometers per hour 110 kilometers per hour 43,000 kilometers per hour 107,00
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Answer:

107,000 kilometers per hour.

Explanation:

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4 years ago
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enyata [817]

I don't understand the question your asking. can you explain more?

6 0
3 years ago
If a fixed length simple pendulum is found to have three times the period on an unknown planet’s surface (compared to Earth), wh
balu736 [363]

Answer:

g/9

Explanation:

length of the pendulum = L

time period on the earth = T

Time period on the planet = 3T

Let the acceleration due to gravity on the earth is g and on the planet is g'.

Use the formula for the time period of a simple pendulum for the time period on earth

T=2\pi \sqrt{\frac{L}{g}}     .... (1)

Time period on the surface of planet is

3T=2\pi \sqrt{\frac{L}{g'}}      .... (2)

Divide equation (2) by equation (1)

\frac{3T}{T}= \sqrt{\frac{g}{g'}}

g' = g/9

Thus, the acceleration due to gravity on the planet is g /9

6 0
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A person would have a different weight on each planet. Arrange the planets in increasing order based on a person’s weight on the
Mars2501 [29]
Mercury, Uranus, Earth, Neptune.

Hope this helps!
5 0
4 years ago
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