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2 years ago

You are standing in an elevator that is accelerating upward. The magnitude

Physics

1 answer:

brilliants [131]2 years ago

3 0

Answer:

All for da gang

The net force on you changes from zero to downward as the elevator begins accelerating.

Explanation:

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An airplane pilot sets a compass course due west and maintains an airspeed of 210 km/h. After flying for a time of 0.490 h, she

tankabanditka [31]

Answer:

$V_{A/E}=55.23km/h\\or\\V_{A/E}=15.342m/s$

Explanation:

The velocity of plane relative to earth is given by:

$V_{P/E}=\frac{d}{t}\\V_{P/E}=\frac{[-121i-20j]km}{0.490h} \\V_{P/E}=[-247i-41j]km/h$

As the from given data.The velocity of plane relative to air is:

$V_{P/A}=[-210i]km/h$

According to relative motion of velocity of the air relative to earth given by:

$V_{A/E}=V_{P/E}-V_{P/A} \\V_{A/E}=[(-247i-41j)km/h]-(-210i)km/h\\V_{A/E}=[-37i-41j]km/h\\$

The magnitude is given as:

$V_{A/E}=\sqrt{(37)^{2}+(41)^{2} }\\ V_{A/E}=55.23km/h\\or\\V_{A/E}=15.342m/s$

5 0

3 years ago

Read 2 more answers

Which two factors does the power of a machine depend on?

lianna [129]

The power of a machine depend on two factors are work and time.

Option C

<u>Explanation:</u>

In science, power defined as the amount of work done in a unit time. i.e. delivering work in a rate of time or energy supply, expressed in input of work or transmitted energy divided by the time interval (t) or W/t.

Example: Some work can be done in the long run with a low-power engine or in a short time with a motor with high performance. The equation for power can be given as

$Power\ (in\ watts) =\frac{\text { work (joules) }}{\text { time (seconds) }}$

$P=\frac{W}{t}$

7 0

3 years ago

My school doesn’t really teach help

Olegator [25]

C
Unbalanced causes something to move because the net force is greater than zero

7 0

3 years ago

Fill in the blanks to complete the sentence.

mina [271]

The answer is:

Fill in the blanks to complete the sentence.

Light acts like a PARTICAL when it bounces off surfaces,

and acts like a WAVE when it bends around objects.

I hope this helps you :>

4 0

3 years ago

Read 2 more answers

HELP ASAP! <br>why is rolling friction much smaller than sliding friction? Also give an example.

IceJOKER [234]

Answer:

Rolling friction is much smaller than sliding friction because Rolling friction is considerably less than sliding friction as there is no work done against the body that is rolling by the force of friction. For a body to start rolling a small amount of friction is required at the point where it rests on the other surface, else it would slide instead of roll.

Rolling Friction example: Anything with weels (cars,skateboards) or a ball rooling.

Sliding Friction example: Bicycle brakes,skinning your knee walking,writing.

6 0

3 years ago