3 years ago

77. The first law of motion applies to

1 answer:

8 0

In the first law, an object will not change its motion unless a force acts on it. So I think the answer is A. Only objects that are moving.

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A student observes a shadow move across the sun during a solar eclipse. Which list represents the position of Earth, the sun, an

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3 years ago

What is not a raquet sport

uysha [10]

Answer:

what

Explanation:

Racket sports include tennis, badminton, squash or any other sport where you use rackets to hit a ball or shuttlecock to play. They can be played competitively or just for fun and are a great form of physical activity.

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3 years ago

How much work would be needed to raise the payload from the surface of the moon (i.e., x = r) to an altitude of 5r miles above t

Cloud [144]

Let the data is as following

mass of payload = "m"

mass of Moon = "M"

now we know that we place the payload from the position on the surface of moon to the position of 5r from the surface

So in this case we can say that change in the gravitational potential energy is equal to the work done to move the mass from one position to other

so it is given by

$W = U_f - U_i$

we know that

$U_f = -\frac{GMm}{6r}$

$U_i = -\frac{GMm}{r}$

now from above formula

$W = -\frac{GMm}{6r} + \frac{GMm}{r}$

$W = \frac{5GMm}{6r}$

so above is the work done to move the mass from surface to given altitude

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3 years ago

What term describes the resistance that one encounters when moving over another

Anvisha [2.4K]

Friction? For example, like when a car's tires skid on rough concrete.

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3 years ago

Convert 3.2 kilometers to feet?

Tanzania [10]

Answer:

10498.7 feet

Explanation:

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3 years ago

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