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steposvetlana [31]
3 years ago
10

If you have an immovable object on a table, and you remove the table from under the object, like in the tablecloth trick what wi

ll happen to the immovable object? Will it fall? Isn't it immovable? Will it just float there? What about gravity?
Physics
1 answer:
Airida [17]3 years ago
4 0

It will not move because you said it is immovable which is immpossible but if it really is unable to move no matter what then it wont move but logicalls if it was real yeah it would move, because of ghravity.

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Arigid body must rotate about an axis in order for it to have angular momentum about that axis. True False
kompoz [17]

Answer:

False

Explanation:

Let's consider the definition of the angular momentum,

\vec{L} = I \vec{\omega}

where I = \int\limits_m r^2 dm = \lim_{n \to \infty} \sum\limits_{i=1}^n m_i r_i^2 is the moment of inertia for a rigid body. Now, this moment of inertia could change if we change the axis of rotation, because "r" is defined as the distance between the puntual mass and the nearest point on the axis of rotation, but still it's going to have some value. On the other hand,

\vec{\omega} = \frac{\vec{r} \times \vec{v}}{r^2} so \vec{\omega} \neq 0 unless \vec{r} ║  \vec{v}.

In conclusion, a rigid body could rotate about certain axis, generating an angular momentum, but if you choose another axis, there could be some parts of the rigid body rotating around the new axis, especially if there is a projection of the old axis in the new one.

7 0
3 years ago
!!!HELP ASAP!!!<br>in witch situation is work being done?<br>theres a photo added.​
Arturiano [62]
C..............................
8 0
3 years ago
If a machine will do 50 J of work in 35 seconds how much power did it produce?
grandymaker [24]
Power is the amount of work done over a period of time. If you will put that into an equation, the formula of power will be:

P = W/t
Where:
P = power
W=work
t = time

Your problem already provides you with work and time so all you need to do is divide:

P = W/t
P = 50J/30s
P = 1.67 W
6 0
3 years ago
Can someone help? Please?
zubka84 [21]

Answer:

A. Speed

Explanation:

Speed is the magnitude of velocity, which is given in the question. Velocity is a vector quantity and therefore has both a magnitude and a direction. Only the former is implied in the question.

5 0
2 years ago
Read 2 more answers
PLEASE HELP, PLEASE A CORRECT ANSWER!​
LUCKY_DIMON [66]

Answer: I like your profile picture

Explanation:

6 0
3 years ago
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