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3 years ago

When does an object falling vertically through the air reach terminal velocity?

Physics

1 answer:

zlopas [31]3 years ago

7 0

Answer:

a. when the acceleration of the objects become negative

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Scientists say that it is hard to track how monarch butterflies migrate

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4 years ago

A rod of length L is hinged at one end. The moment of inertia as the rod rotates around that hinge is ML2 /3. Suppose a 2.00-m r

Stels [109]

To solve this problem we will apply the concepts related to the moment of inertia and Torque, the latter both its translational and rotational expression.

According to the information given the moment of inertia of the body would be

$I = \frac{1}{3} mL^2$

Replacing we have

$I = \frac{1}{3} (3kg)(2m)^2$

$I = 4 kg * m^2$

Now the translational torque would be the product between the force applied (Its own Weight) and the distance (Its center of mass at the middle)

$\tau = F*r$

$\tau = mg (\frac{L}{2})$

$\tau = (3)(9.8)(\frac{2}{2})$

$\tau = 29.4N\cdot m$

Now the rotational torque is defined as the product between the moment of inertia and the angular acceleration, then,

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

Replacing,

$\alpha = \frac{29.4}{4}$

$\alpha =7.35 rad / s^2$

Therefore the angular acceleration is $7.35rad/s^2$

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3 years ago

The velocity of a bus increases from 27km/h to 30m/s in . Calculate its acceleration.

Ksivusya [100]

Explanation:

Correct option is

1m/s

in the given question we have

u=36 km/hr =36×

m/s=10m/s

v= 72 km/hr=72×

m/s=20m/s

t=10 s

a=?

we know the formula

v= u +at

20 = 10+ a 10

20-10 =10 a

10 = 10 a

a = 1 m/s

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3 years ago

If you do not receive enough calories, which occurs? 1. Gain weight 2. Too much sugar 3. Impaired metabolic processes 4. Maintai

kipiarov [429]

3 impaired metabolic processes

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3 years ago

A circular coil has a 8.79 cm radius and consists of 42.0 closely wound turns of wire. An externally produced magnetic field of

OverLord2011 [107]

Answer: The magnetic flux is 3.4 × 10^-3 Wb

Explanation: Please see the attachments below

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3 years ago