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2 years ago

A boy weighs 50 kg and is running with 225 J of energy, what is his velocity?

Physics

2 answers:

Oksanka [162]2 years ago

8 0

0.22

Explanation:

50 ÷ 225 = 0.22

#CarryOnLearning

Natali [406]2 years ago

8 0

0.22 Is the answer. Have a great day!

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A 150 kg safe on frictionless casters is being raised at 1.20m to the bed of a truck using planks 4m long. The force needed to p

Vesnalui [34]

The only thing you need to know in order to solve this task is that plank length (which is force x), should equal the increase in potential energy, so what we have now : (mass)* g * (height).
It has to look like that: 
F * 3.0 = 150 x 9.81 x 1.20
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A 75Kg man jumps from a window 1.0m above the sidewalk. If the man falls with his knees and ankles locked, the only cushion for

liq [111]

Answer:

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Explanation:

m = Mass of person = 75 kg

h = Height of fall = 1 m

g = Acceleration due to gravity = 9.81 m/s²

F = Force

s = Displacement = 0.49 cm

Potential energy is given by

$P=mgh\\\Rightarrow P=75\times 9.81\times 1\\\Rightarrow P=735.75\ J$

Work is given by

$W=Fs\\\Rightarrow F=\frac{W}{s}\\\Rightarrow F=\frac{735.75}{0.0049}\\\Rightarrow F=150153.06122\ N$

The average force exerted is 150153.06122 N

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2 years ago

consider the photoelectric effect experiment. in one experiment yellow light shines on a piece of potassium metal. a current is

kompoz [17]

Explanation:

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I = Q/t, as the charge increase , the current will also increase.

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2 years ago

Balancing carefully, three boys inch out onto a horizontal tree branch above a pond, each planning to dive in separately. The th

VikaD [51]

Answer:

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Explanation:

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Answer:

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Explanation:

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1 year ago