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lana66690 [7]
3 years ago
9

A 4 kg block is pushed up an incline that makes a 30° angle with the horizontal, as shown in the figure. Once the block is pushe

d a distance of d = 5.0 m up the incline, the block remains at rest.
What is the approximate change in the gravitational potential energy of the block-Earth system when the block is held at rest compared to its original location at the bottom of the incline?
A) OJ
B) 100 J
C) 100/33 J
D) 200 J
Physics
1 answer:
Sophie [7]3 years ago
8 0

Answer:

  B)  100 J

Explanation:

Assuming the distance given is measured along the incline, the vertical change in height is (5 m)(sin 30°) = 2.5 m. Then the change in potential energy is ...

  ∆PE = mg(∆h) = (4 kg)(10 m/s^2)(2.5 m) = 100 J

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Answer:

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Explanation:

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A race car moving along a circular track has a centripetal acceleration of 15.4 m/s? If the car has
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Answer:

r = 58.44 [m]

Explanation:

To solve this problem we must use the following equation that relates the centripetal acceleration with the tangential velocity and the radius of rotation.

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All of the following are regulated by the medulla except
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A 150 kg boy and his bike are traveling 12 m/s when he slams on his breaks and stop at his friend’s house. How much impulse is r
Nataly [62]

Answer:

J = 1800 kg-m/s

Explanation:

Given that,

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We need to find the impulse is required to produce this change in momentum. We know that impulse is equal to the change in momentum. So,

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So, the impulse is equal to 1800 kg-m/s

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3 years ago
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