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3 years ago

10

A spacecraft left Earth to collect soil samples from Mars. Which statement is true about the strength of Earth’s gravity on the

moving spacecraft?

1 answer:

ryzh [129]3 years ago

5 0

Answer:

: It Decreases.

As the spacecraft gets farther and farther from Earth, the gravitational

forces between the spacecraft and the Earth decrease.

Explanation:

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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

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disa [49]

The acceleration due to gravity is g/4

The acceleration above the earth surface is given by the relation

g^'=gr^2/〖(h+r)〗^2

Since the satellite orbits the earth in a orbit of radius equal to earth radius, therefore

g^'=(gr^2)/〖(r+r)〗^2 =g/4

Thus the acceleration due to gravity on the satellite is g/4.

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3 years ago

6. Rock Ais thrown horizontally off a cliff with a velocity of 15 m/s. The rock lands 75m from

Harman [31]

Answer:

5 seconds

Explanation:

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at the moment a truck traveling with a constant velocity of 13.6 m/s passes a dog at rest the dog begins moving with a constant

goblinko [34]

I don’t know how to help you hope you figure it out have a good day

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2 years ago

Which has a higher frequency - visible or infrared radiation?

bearhunter [10]

Visible has a higher frequency

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3 years ago