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user100 [1]
3 years ago
10

1. What are the two quantities involved when calculating MOMENTUM?

Physics
1 answer:
Snezhnost [94]3 years ago
8 0

Answer:

Mass and Velocity

Explanation:

Momentum = Mass  X Velocity

or p=m' x v

since in physics p is quantity momentum and m stands for mass and v stands for velocity.

Hope this helps :)

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A student, standing on a scale in an elevator at rest, sees that his weight is 840 n. as the elevator rises, his weight increase
Firlakuza [10]
<span>1) at rest his weight is 840 N

=> 840N = mass * g => mass = 840 N / g = 840 N / 9.8 m/s^2 = 85.7 kg

2) as the elevator rises, his weight increases to 1050 N,

The reading of the scale is the norma force of it over the body of the person.

And the equation for the force is: Net force = mass * acceleration = normal force - weight at rest

=> mass * acceleration = 1050 N - 840 N = 210 N

acceleration = 210 N / mass = 210 N / 85.7 kg = 2.45 m/s^2 (upward)

3)  when the elevator slows to a stop at the 10th floor, his weight drops to 588 N

=>  mass * acceleration = 588 N - 840 N = - 252 N

=> acceleration = - 252 N / 85.71 kg = - 2.94 m / s^2 (downward)

Answer:

Acceleration at the beginning of the trip 2.45 m/s^2 upward
Acceleration at the end of the trip 2.94 m/s^2 downward
</span>
6 0
3 years ago
What do we call the quantity of matter that an object contains?
german

Answer: A MASS

Explanation:LOOKED IT UP

3 0
3 years ago
A 30 kg mass and a 20 kg mass are joined by a light rigid rod and this system is free to rotate in the plane of the page about a
stepan [7]

55 J

Explanation:

Kinetic energy is given as: 0.5MV^2 where M is the mass and V is the speed of rotation. Since the masses are point masses, we calculate the point mass for each mass.

M1 = 30*0.2^2 = 1.2kgm^2

M2 = 20*0.4^2 = 3.2kgm^2

V = 5 rad/s

Calculating using the formula above, we obtain :

0.5(1.2+3.2)5^2 =0.5*4.4*25 = 55 J

3 0
3 years ago
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Explanation:

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WHICH SHOULD NOT BE PART OF SCIENTIFIC INQUIRY
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