3 years ago

A ball of 12 kg is attached to a string of 0.8 meter spun at 4

Physics

1 answer:

lesantik [10]3 years ago

6 0

Answer:

240 N

Explanation:

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vladimir2022 [97]

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2 years ago

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Which processes cause rocks to be exposed<br> at Earth's surface? SC.7..6.2

seropon [69]

Answer:

weathering

Explanation:

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3 years ago

When a cup is placed on a table, which force prevents the cup from falling to the ground?

zhuklara [117]

Answer:

B. normal force

Explanation:

Because there is no frictional or resistance force. However gravitational force is applied downroad from the center of the cup thus the contact force that is perpendicular to the surface that an object contacts which is the normal force exerted upward from the table that prevents an object from falling.

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3 years ago

In a shipping yard, a crane operator attaches a cable to a 1,400 kg shipping container and then uses the crane to lift the conta

Molodets [167]

Answer:

Explanation:

Given

mass of crane $m=1400\ kg$

distance moved $d=40\ m$

Since it is moving with a constant velocity therefore net force on it is zero

Tension force=weight

T=mg

Work done by Tension T is

$W_T=T\cdot d$

$W_T=1400\times 9.8\cdot 40$

$W_T=548.8\ KJ$

Work done by Gravity will be equal in magnitude but opposite in sign and can be obtained by work energy theorem which states that change in kinetic energy of object is equal to work done by all the forces

$W_T+W_g=0$

$W_g=-548.8\ KJ$

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3 years ago

Which explanation of the solar system best fits the observations of the planets and how they orbit the sun?

NeTakaya

You're right, Answer C

The dust and gas accumulate to form a solar nebula, which later on creates the star and the planets.

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3 years ago

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