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Vesnalui [34]
3 years ago
14

You throw a rock upward. The rock is moving upward, but it is slowing down. If we define the ground as the origin, the position

of the rock is _____ and the velocity of the rock is _____.
A. positive, positive
B. positive, negative
C. negative, positive
D. negative, negative
Physics
1 answer:
lyudmila [28]3 years ago
6 0

Answer:

A. Positive, positive

Explanation:

As we defined the ground is the origin, as long as the rock is above the ground, its position would always be positive.

As for velocity, as long as the rock is moving upwards, its direction is also upward, so its velocity is always positive. The velocity will become negative when the rock falls down.

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It is an example of balanced force.


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3 years ago
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Choose the correct statement regarding the sign conventions for lenses.
Savatey [412]

Answer:

a) false

b) True

c) True

d) False

e) False

Explanation:

a) False

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c) True

d) False

For a diverging lens, the focal length is negative while it is positive for a converging lens

e) False

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3 years ago
1 (3 points)
trapecia [35]

Answer:

300

Explanation:

15x20

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Can someone tell me everything they know about mechanical waves and ASAP, please!?!?!?
oksano4ka [1.4K]

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A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far fro

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3 years ago
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Moment of inertia Wheel If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at
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Answer:

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Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

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Torque is given by

\tau=I\alpha\\\Rightarrow \tau=0.3\times (-0.376991118431)\\\Rightarrow \tau=-0.113097335529\ Nm

The magnitude of torque is 0.113097335529 Nm

6 0
3 years ago
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