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iren [92.7K]
3 years ago
12

A 30 kg block with velocity 50 m/s is encountering a constant 8 N friction force. What is the momentum of the block after 15 sec

onds?
Physics
1 answer:
n200080 [17]3 years ago
8 0

Answer: vf = 46 m/s

Explanation:

An impulse results in a change of momentum

FΔt = mΔv

-8(15) = 30Δv

Δv = -4 m/s

50 + (-4) = 46 m/s

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kifflom [539]

Answer:

The given statement is false.

Explanation:

The spherical mirrors are the mirror that are a part of a sphere. Concave and convex mirrors are two types of spherical mirrors.

A concave mirror always forms real and inverted image. A convex mirror forms real and virtual images.

For concave mirror, the value of magnification is less that 1. Also, the focal length is negative for concave mirrors.

So, the given statement is false as a concave mirror always forms a real and inverted image. Hence, this is the required solution.

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4 years ago
Which type of radiation travels at the speed of light and penetrates matter easily?
goblinko [34]
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7 0
4 years ago
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What is the speed of a bobsled whose distance-time graph indicates that it traveled 113m in 29s?
Elza [17]
In this item, we are asked to determine the speed of the bobsled given the distance traveled and the time it takes to cover the certain distance. This can mathematically be expressed as,
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Substituting the given values in this item,
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3 0
3 years ago
If the force on an object is in the negative direction, the work it does on the object must be:.
Inga [223]

Answer:

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Explanation:

6 0
2 years ago
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If the PLATE SEPARATION of an isolated charged parallel-plate capacitor is doubled: A. the electric field is doubled
mash [69]

Explanation:

The electric field of an isolated charged parallel-plate capacitor is given by :

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So, the correct option is (E) i.e. "none of the above".

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