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Lena [83]
3 years ago
11

A tennis ball of mass 0.060 kg travels horizontally at a speed of 25m/s. The ball hits a tennis

Physics
2 answers:
stepladder [879]3 years ago
7 0
It would be A because a is perfect
Novosadov [1.4K]3 years ago
5 0
I got A as the answer
Explanation:
Subtract the final velocity by the starting velocity and the divide by the time,
40-25= 15, so then divide 15 by the time ,50, to get 0.3. Now that the velocity is know u then multiple 0.3 by the mass of the tennis ball, 0.060, to get 0.018 Newton’s as the force being exerted.
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4 years ago
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snow_lady [41]
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3 years ago
A 4.40-m-long, 500 kg steel uniform beam extends horizontally from the point where it has been bolted to the framework of a new
icang [17]

Answer:

Torque=13798.4 N.m

Explanation:

Given data

Mass of beam m₁=500 kg

Mass of the person m₂=70 kg

length of steel r₁=4.40m

center of gravity of the beam is at r₂=r₁/2 =4.40/2 = 2.20m

To find

Torque

Solution

Torque due to beam own weight

T_{1}=m_{1}gr_{1}\\ T_{1}=500*2.2*9.8\\T_{1}=10780N.m

Torque due to person

T_{2}=m_{2}r_{2}g\\T_{2}=70*(4.40)*(9.8)\\T_{2}=3018.4 N.m

Now for total torque

T_{total}=T_{1}+T_{2}\\T_{total}=10780+3018.4\\T_{total}=13798.4N.m

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The heart working with the blood vessels to pump blood is which body system?
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3 years ago
1. In terms of momentum conservation, why does a cannon recoil when fired?
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Newtons law of motion for every action there’s an equal and opposite reaction.
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Read 2 more answers
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