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Tatiana [17]
2 years ago
13

Describe what it means to view something from a frame of reference.Give an example to illustrate your explanation.

Physics
1 answer:
Roman55 [17]2 years ago
8 0

like just try and try you gut it just trust me I'm a Wuman and you a man

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A man (weighing 763 N) stands on a long railroad flatcar (weighing 3513 N) as it rolls at 19.8 m/s in the positive direction of
Burka [1]

Answer:

0.8m/s

Explanation:

Weight of mas,F=763 N

Mass of man=\frac{F}{g}=\frac{763}{9.8}=77.86 kg

By using g=9.8m/s^2

Weight of flatcar=F'=3513 N

Mass of flatcar=\frac{3513}{9.8}=358.5 Kg

Total mass of the system=Mass of man+mass of flatcar=77.86+358.5=436.36 kg

Velocity of system=19.8m/s

Let v be the velocity of flatcar with respect to ground

Velocity of man relative to the flatcar=-4.68m/s

Final velocity of man with respect to ground=v-4.68

By using law of conservation of momentum

Initial momentum=Momentum of car+momentum of flatcar

436.36(19.8)=77.86(v-4.68)+358.5v

8639.928=77.86v-364.3848+358.5v

8639.928+364.3848=436.36 v

9004.3128=436.36v

v=\frac{9004.3128}{436.36}

v=20.6 m/s

Initial speed of flatcar=Speed of system

Increase in speed=Final speed-initial speed=20.6-19.8=0.8m/s

4 0
2 years ago
According to Newton's second law of motion, if we have a rigid, unchanging mass and we observe it accelerating, what must be hap
kkurt [141]

The force is applied to the accelerating object that has a constant mass. Option A is correct.

<h3>What does Newton's second law of motion state?</h3>

The force applied to the object is the product of its mass and acceleration.

F = ma

Where,

F - force

m- mass

a - acceleration

From the equation, the force and the acceleration are in a proportional relation. The mass is not changing as given in the question.

Therefore, the force is applied to the accelerating object that has a constant mass.

Learn more about Acceleration:

brainly.com/question/2437624

8 0
2 years ago
Why do smaller endotherms require more energy per unit of mass than larger endotherms?
Naily [24]
They expend more oxygen. Littler endotherms lose warmth to the earth proportionately speedier than huge endotherms: less warm mass, protecting layers in littler creatures are less successful by dint of being more slender, and more prominent surface region to volume proportion implies snappier radiation of warmth
4 0
2 years ago
Wel.
Law Incorporation [45]

Answer:

1 is c 2 is a and 3 is b hope that helped!

4 0
3 years ago
Why the watt is called derived unit ?​
Yuri [45]

Answer:

It is because it is a unit of Power(which is a derived quantity)

4 0
2 years ago
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