Physics, 17.09.2019 11:30 FrankyV4387

Rank the following in terms of increasing momentum:
a. a 10,000 kg train car at rest
b. a 100 kg person running at 5 m/s
c. a 1200 kg car going 15 m/s
d. a 15 kg meteor going at a speed of 1000 m/s

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Answer from: destinyharris2586

Based on increasing momentum, the given equations are ranked as following,

1. A 1200 kg car going 15 m/s with momentum 18000 kgm/s.

2. A 15 kg meteor going at the speed of 1000 m/s with momentum 15000 kgm/s.

3. A 100 kg person running at 5 m/s with momentum 500 kgm/s.

4. A 10,000 kg train car at rest with zero momentum.

Explanation:

Momentum is the mass in motion i.e. an object is said to have momentum when it is in motion. The momentum of the object depends upon the mass and the velocity of the object. It is vector quantity since it has both direction and magnitude. The momentum can be evaluated using the formula,

$\vec{p}=m \times \vec{v}$

where $\vec{p}$ is the momentum,m is the mass and $\vec{v}$ is the velocity of the object

Momentum of given cases,

A) A train car at rest: The momentum of an object at rest is always 0.

B) A 100kg person running at 5 m/s: $\vec{p}=m \times \vec{v}=100\ \mathrm{kg} \times 5\ \mathrm{m} / \mathrm{s}=500\ \mathrm{kgm} / \mathrm{s}$

Therefore, momentum of the person is 500 kgm/s.

C) A 1200kg car going at 15m/s: $\vec{p}=m \times \vec{v}=1200\ \mathrm{kg} \times 15 \frac{\mathrm{m}}{\mathrm{s}}=18000\ \mathrm{kgm} / \mathrm{s}$

Therefore, momentum of the person is 18000 kgm/s.

D) A 15 kg meteor going at the speed of 1000m/s:

$\vec{p}=m \times \vec{v}^=15\ \mathrm{kg} \times 1000\ \mathrm{m} / \mathrm{s} =15000\ \mathrm{kgm} / \mathrm{s}$

Therefore, momentum of the meteor is 15000 kgm/s.

Answer from: Quest

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes

Answer from: Quest

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.

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Rank the following in terms of increasing momentum:
a. a 10,000 kg train car at rest
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