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3 years ago

In uniform circular motion, which of the following quantities are constant?

Physics

1 answer:

Sindrei [870]3 years ago

6 0

Answer:

speed

Explanation:

When a body is in uniform circular motion, its speed remains constant but its velocity, angular acceleration, angular velocity changes due to change in its direction.

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The triceps muscle in the back of the upper arm extends the forearm.

iren [92.7K]

To solve this problem it is necessary to apply the concepts related to Torque as a function of Force and distance. Basically the torque is located in the forearm and would be determined by the effective perpendicular lever arm and force, that is

$\tau = F \times r$

Where,

F = Force

r = Distance

Replacing,

$\tau = 2*10^3*0.03$

$\tau = 60N\cdot m$

The moment of inertia of the boxer's forearm can be calculated from the relation between torque and moment of inertia and angular acceleration

$\tau = I \alpha$

I = Moment of inertia

$\alpha$ = Angular acceleration

Replacing with our values we have that

$I = \frac{\tau}{\alpha}$

$I = \frac{60}{120}$

$I = 0.5kg\cdot m^2$

Therefore the value of moment of inertia is $0.5kg\cdot m^2$

8 0

3 years ago

a magnet has a 20 cm magnetic field if a piece of metal is 18 cm from the magnet will it be attracted or not

mina [271]

Answer:

yes

Explanation:

The metal is closer than 20 cm to the magnet which is in the magnetic field.

4 0

3 years ago

Which property describes the amount of energy that flows past a given area per unit of time

shepuryov [24]

Answer:

Electric current

Explanation:

8 0

3 years ago

14. The ancient geographic setting of an area is known as its

kolezko [41]

I think the correct answer from the choices listed above is option C. The ancient geographic setting of an area is known as its paleogeography. Paleogeography is the study of historical geography and is generally used in studying physical landscapes. Hope this answers the question. Have a nice day.

6 0

4 years ago

An object on the moon feels lighter than the same object on earth. which statement explains this phenomenon?

natka813 [3]

Answer:

Explanation:

cause

7 0

3 years ago