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AleksandrR [38]
3 years ago
8

A motor produces less mechanical energy than the energy it uses because the motor?

Physics
1 answer:
In-s [12.5K]3 years ago
3 0
<span>A motor produces less mechanical energy than the energy it uses because the motor looses some energy to heat.</span>
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A boy and a girl are riding on a merry-go-round which is turning at a constant rate. The boy is near the outer edge, and the gir
xxTIMURxx [149]

Answer:

Boy has the greater linear velocity.

Explanation:

The liner velocity in a rotatory system is defined as:

v = ω×r

where,

v is the liner velocity

ω is the angular velocity

r is the radius.

The boy is near the edge and the girl is closer to the center. The scenario is shown in the image below.

As, mentioned in question, they are turning out at a constant rate, so the angular velocities of both the boy and the girl are same.

<u>From the above inference, it can be concluded that now the linear velocity only depends on the radius of the disc. The linear velocity is directly proportional to the distance from the center.</u>

Thus, the greater the distance from the center, the greater the value of liner velocity.

<u>From the question also and from the image also the distance of the boy from the center is greater than the distance of the girl from the center. </u><u>That's why boy has greater linear velocity. </u>

3 0
3 years ago
One end of an elastic cord is fastened to a steel beam. A metal weight with a mass of 68 kg is attached to the other end of the
Vika [28.1K]

Hi there!

We can use IMPULSE to solve.

Recall impulse:

I = \Delta p = m\Delta v = m(v_f - v_i)

Begin by calculating the impulse. Assuming up to be the + direction, and down to be the - direction.

I = 68(11 - (-14)) = 68 \cdot 25 = 1700 kg\frac{m}{s}

Now, we can calculate force using this value:

I = F \cdot t\\\\F = \frac{I}{t}\\\\F = \frac{1700}{0.85} = \boxed{2000 N}

<u>The weight experiences a net force of 2000N UPWARDS.</u>

4 0
2 years ago
2. CHARLES MANSON WAS DIAGNOSED WITH
PilotLPTM [1.2K]

Answer:

The answer is C. anti social

Explanation:

Hope that helps!

3 0
3 years ago
What is general relativity
juin [17]
General relativity is a theory of space and time. The theory was published by Albert Einstein in 1915. The central idea of general relativity is that space and time are two aspects of spacetime. Spacetime is curved when there is gravity, matter, energy, and momentum.
5 0
3 years ago
IF a car trip 400 km in four hours what is the rate of speed that a car is traveling?
Andreas93 [3]

Speed = Distance/ Time

Speed = 400 / 4

Speed = 100 km/hr.

100 km per hour.
8 0
3 years ago
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