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beks73 [17]
3 years ago
7

Which model would best demonstrate the role of gravity in the Solar System? O A. a large ball with 8 smaller balls arranged arou

nd it because gravity is between the sun and 8 planets O B. a magnet drawn close to another magnet because planets are dbvn towards the magnetism of the Sun O c. a football field with a pea at one end and a grain of sand at the other because the scale of gravity is large O D. a ball attached to a string moving in a circular motion because the string keeps the ball in place like gravity​

Physics
1 answer:
spin [16.1K]3 years ago
7 0
Option D would be the correct answer
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A 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the
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Answer:

A.) 1372 N

B.) 1316 N

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Explanation:

Given that a 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the cable for the following cases:

a. The load moves downward at a constant velocity

At constant velocity, acceleration = 0

T - mg = ma

T - mg = 0

T = mg

T = 140 × 9.8

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b. The load accelerates downward at a rate 0.4 m/s??

Mg - T = ma

140 × 9.8 - T = 140 × 0.4

1372 - T = 56

-T = 56 - 1372

- T = - 1316

T = 1316N

C. The load accelerates upward at a rate 0.4 m/s??

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T - 140 × 9.8 = 140 × 0.4

T - 1372 = 56

T = 56 + 1372

T = 1428N

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