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gogolik [260]
3 years ago
9

What is the acceleration aaa of the refrigerator 4 ss after the person begins pushing on it with a force of 400 NN

Physics
1 answer:
ruslelena [56]3 years ago
3 0

Answer:

2 ms^2

Explanation:

Given that the mass of the refrigerator  is 200Kg

The net force acting on the refrigerator is 400N

The time takes is 4s

From Newtons's second law of motion;

F =ma

a = F/m

a = 400/200

a = 2 ms^2

This is a constant acceleration

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Explanation:

For this problem, use the first law of thermodynamics. The change in energy equals the increase in heat energy minus the work done.

ΔU=Q−W

We are not given a value for work, but we can solve for it using the force and distance. Work is the product of force and displacement.

W=FΔx

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W=6J

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2 years ago
What is the kinetic energy of a 0.135 kg baseball thrown at 40 m/s
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A physical change is a change to the physical properties of a substance. This type of change does
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A radio have a wavelength of 0.3m and travels at a speed of 300,000,000 m/s. What is the frequency of this wave?​
Ilya [14]

The frequency of the wave is 1\cdot 10^9 Hz

Explanation:

The frequency, the wavelength and the speed of a wave are related by the following equation:

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For the radio wave in this problem,

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