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Crazy boy [7]
3 years ago
15

We can see stars like the Sun because they​

Physics
1 answer:
Strike441 [17]3 years ago
8 0

Answer:

are nearby and bright i hope this helps

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Speed is calculated by distance divided by time
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Does anyone know how to solve this? 4+9×2÷3−1
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The answer is 7.66. c:

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Alex is asked to move two boxes of books in contact with each other and resting on a frictionless floor. He decides to move them
Anit [1.1K]

Answer:

2.8 N

Explanation:

Fp = 7.7 N

mA = 12.1 kg

mB = 7 kg

Let a be the acceleration and Fc be the contact force between A and B.

By the free body diagram, use Newton's second law

Fp - Fc = mA x a ..... (1)

Fc = mB x a ..... (2)

Adding both the equations

Fp = (mA + mB) x a

7.7 = (12.1 + 7) x a

a = 0.4 m/s^2

Substitute this value in equation (2), we get

Fc = 7 x 0.4 = 2.8 N

Thus, the contact force between the two blocks is 2.8 N.

Explanation:

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3 years ago
A girl who is watching a plane fly tells her friend that the plane isn't moving at all. Describe a frame of reference in which t
Dafna1 [17]
If the plane is far away and flying directly toward or away from
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A man cleaning his apartment pushes a vacuum cleaner with a force of magnitude 84.5 N. The force makes an angle of 33.9 ◦ with t
Sav [38]

Answer:

183.75641 Joules

Explanation:

F = Force of the vacuum cleaner = 84.5 N

s = Displacement of the vacuum cleaner = 2.62 m

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Work done is given by

W=F\times scos\theta\\\Rightarrow W=84.5\times 2.62\times cos33.9\\\Rightarrow W=183.75641\ J

The work done by the force of the vacuum cleaner is 183.75641 Joules

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