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Virty [35]
3 years ago
6

Railroad cars are loosely coupled so that there is a noticeable time delay from the time the first and last car is moved from re

st by the locomotive. Discuss the advisability of this loose coupling and slack between cars from the point of view of impulse and momentum.
Physics
1 answer:
olga nikolaevna [1]3 years ago
8 0

Answer:

Without this slack, a locomotive might simply sit still and spin its wheels. The loose coupling enables a longer time for the entire train to gain momentum, requiring less force of the locomotive wheels against the track. In this way, the overall required impulse is broken into a series of smaller impulses. (This loose coupling can be very important for braking as well).

Explanation:

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Answer:

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Explanation:

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2 years ago
The girl is using her arm to lift a weight. Her arm is acting as a _______.
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3 0
3 years ago
According to Kepler's third law (p2 = a3), how does a planet's mass affect its orbit around the Sun? Group of answer choices
anyanavicka [17]

Answer:

A planet's mass has no effect on its orbit around the Sun.

Explanation:

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p^2=a^3

where p is the orbit period and a is the semi-major axis.

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The equation tells us that the closer a planet is to the sun, the faster it will go around it.

The mass does not appear in the equation to calculate the period.

This is why it is concluded from the third law of Kepler that<u> the period, or the orbit of a planet around the sun, does not depend on its mass.</u>

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3 0
3 years ago
What does a tachometer measure?
nlexa [21]
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6 0
4 years ago
All else equal, the payback period for a project will decrease whenever the_______.
telo118 [61]

Answer:

(B) cash inflows are moved earlier in time.

Explanation:

The payback period stated time-frame during which the initial amount of investment should be recovered. It is expressed in the year form

The formula to compute the payback period is shown below:

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where,  

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The payback period of the project decreases when the accumulated starting year cash flows increases that results the movement of the cash inflows earlier in time

3 0
3 years ago
Read 2 more answers
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