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cestrela7 [59]
3 years ago
14

The graph shows the progress of a car which traveled 300 km in 5 hrs. Assuming that its speed remained constant, how far had the

car gone after 2 hrs?
Physics
1 answer:
lisov135 [29]3 years ago
6 0
If the car travels
300 km.........................5 hrs
?km ..............................2h
to find out we do (300*2)/5=600/5=120km
also
300km/5h=60km/h
in 2 hours
120km
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Answer:

If the system consists of the block only, the work done by the gravity is negative.

If the system consists of the block and the earth the work done by the gravity is zero.

Explanation:

If the system consists of the block only, then the system experiences two external forces: one exerted by the hand that lifts the block vertically upward and other exerted by the earth (gravity), which is opposed to the movement of the system, so the work done by gravity is negative.

On the other hand, if the system consists of the block and the earth, then only exists a external force which is the exerted by the hand. So, the force exerted by gravity is zero.

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Explanation: The formula that defines the velocity of a simple harmonic motion is given as

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The maximum speed of a simple harmonic motion is derived when x = A, hence v = ωA

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x² = 0.0002142

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To solve for distance use the formula for distance d = st, or distance equals speed times time.

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