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FromTheMoon [43]
4 years ago
7

A commuter train travels from New York to Washington, DC, and back in 6 hours and 5 minutes. The distance between the two statio

ns is approximately 363km. What is the displacement of the train?
Physics
1 answer:
vovikov84 [41]4 years ago
3 0

Answer:

The train's displacement is zero.

Explanation:

Given data,

The time taken by the train from NY to Washington and back is, t = 6 h 5 min

The distance between the two stations is, d = 363 km

Therefore, the total distance the train traveled is, d' = 726 km

The displacement is defined as the change in position coordinates with respect to its original position.

If the train travels from one point and returns back to the same point after some time, there is no change in the position coordinates with respect to its original position.

Hence, the train's displacement is zero.

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Answer:

f=140\ N

Explanation:

Given:

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<u>Now the value of limiting frictional force offered by the contact surface tending to have a relative motion under the effect of force:</u>

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So, the frictional force will not be at its maximum and will be equal in magnitude to the applied external force and hence the body will not move.

so, the frictional force will be:

f=140\ N

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A weightlifter liftsa 1,250-N barbell 2 m in 3 s. how much power was used to lift the barbell?
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