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puteri [66]
4 years ago
5

4.

Physics
1 answer:
Ulleksa [173]4 years ago
4 0
The correct answer is C. Universal Gravitation (it was written by Issac Newton)
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Buckets and a Pulley Two buckets of sand hang from opposite ends of a rope that passes over an ideal pulley. One bucket is full
marin [14]

Answer:

A: T = 120 N

B: T = 88.42 N

C: T = 70 N

Explanation:

Part A:

Since, the lighter bucket is supported by my had. So, the only unbalanced force in the system is the weight of heavier bucket. Hence, the tension in rope will be equal to the weight of heavier bucket.

<u>T = 120 N</u>

<u></u>

Part B:

This is the case where, two masses hang vertically on both sides of the pulley. To find the tension in such case we have the formula:

T = (2 m₁m₂g)/(m₁+m₂)

where,

m₁ = mass of heavier object = W₁/g = (120 N)/(9.8 m/s²) = 12.24 kg

m₁ = mass of lighter object = W₂/g = (70 N)/(9.8 m/s²) = 7.14 kg

g = 9.8 m/s²

Therefore,

T = [(2)(12.24 kg)(7.14 kg)(9.8 m/s²)]/(12.24kg + 7.14 kg)

T = 1713.6 N.kg/19.38 kg

<u>T = 88.42 N</u>

<u></u>

Part C:

Since, the heavier bucket is on ground. So, its weight is balanced by the normal reaction of the ground. The only unbalanced force in the system is the weight of lighter bucket. Hence, the tension in rope will be equal to the weight of lighter bucket.

<u>T = 70 N</u>

4 0
3 years ago
What is the ratio of thicknesses of crown glass and water that would contain the same number of wavelengths of light?
Serhud [2]

Answer:

the thickness of the glass divided by thickness of water is going to be 1.333 divided by 1.52, which is 0.877. So, the height of this glass, in order to have the same number of wavelengths as in water, the height of the glass will be 0.877 times the height of the water, and so it will be smaller.

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A machine: A- Makes work easier to do
Vlad1618 [11]

A: makes work easier to do.

5 0
3 years ago
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Can plz anyone solve this​
neonofarm [45]

Answer:

1 Ohm

Explanation:

Resistance: Voltage/Current

R: 1.5/ 1.5 = 1 Ohm

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A roller coaster car is traveling on a track without any friction or added energy. The people, car, and track of the roller coas
Harlamova29_29 [7]

Answer:

This might not be right but i think it is "Speedway Coasters, Inc., reserves the right to exact a $50.00 fine"

Explanation:

3 0
4 years ago
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