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3 years ago

Gravity is needed to determine an object's _____. A. mass only B. weight only C. mass and weight

Physics

2 answers:

velikii [3]3 years ago

6 0

Answer:

Explanation:

Mass is the amount of matter in an object. Weight is the force of gravity on an object.

Savatey [412]3 years ago

6 0

Your first response has it right. Weight is determined by gravity. To understand this better, it’s helpful to think of mass as the “stuff” that an object is made of. All of it’s atoms. All of them. This amount doesn’t change whether you’re on earth or the moon, for example. You are you in both places. Your weight however, changes from earth to the moon, because the gravity, or force that pulls you and the earth together, is different from the gravity of the moon. The earth and you are attracted more strongly and you therefore have a greater weight. If you were on Jupiter you’d weigh even more than you do on earth. Much, much more.

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Is the tropic of cancer north or south of the equator?

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It’s North of the equator

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3 years ago

Read 2 more answers

Determine the momentum of a 15,000 kg truck traveling at 15 m/s

S_A_V [24]

Answer:

mass*velocity=1.5*10^4 * 15

= 22.5*10^4

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3 years ago

At what distance above the surface of the earth is the gravitational field 4.9 m/s^2

san4es73 [151]

That's 1/2 of what it is on the surface.

The distance between the center of the Earth and any object
on the surface is 1 Earth radius ... about 3960 miles.

Gravitational force is inversely proportional to the square of
the distance between the centers of the objects, so in order
to reduce the acceleration of gravity by 1/2, you increase the
distance by √2 .

   (3960 miles) x (√2) = 5,600 miles from the center

   = 1,640 miles above the surface.

5 0

4 years ago

A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 592 N. As the elevator la

gladu [14]

Answer:

Explanation:

According to newton's secomd law, ∑F = ma

∑F is the summation of the force acting on the body

m is the mass of the body

a is the acceleration

Given the normal force when the elevator starts N1 = 592N

Normal force after the elevator stopped N2 = 400N

When the elevator starts, its moves upward, the sum of force ∑F = Normal (N)force on the elevator - weight of the person( Fg)

When moving up;

N1 - Fg = ma

N1 = ma + Fg ...(1)

Stopping motion of the elevator occurs after the elevator has accelerates down. The sum of forces in this case will give;

N2 - Fg = -ma

N2 = -ma+Fg ...(2)

Adding equation 1 and 2 we will have;

N1+N2 = 2Fg

592N + 400N = 2Fg

992N 2Fg

Fg = 992/2

Fg = 496N

The weight of the person is 496N

<em>\b) To get the person mass, we will use the relationship Fg = mg</em>

g = 9.81m/s

496 = 9.81m

mass m = 496/9.81

mass = 50.56kg

c) To get the magnitude of acceleration of the elevator, we will subtract equation 1 from 2 to have;

N1-N2 = 2ma

592-400 = 2(50.56)a

192 = 101.12a

a = 192/101.12

a = 1.90m/s²

3 0

4 years ago

Hi please answer and show your work

jek_recluse [69]

Answer:

$\huge\boxed{\sf P.E. = 240\ MJ}$

$\huge\boxed{\sf K.E. = 19.6\ MJ}$

Explanation:

<u>Given:</u>

Mass = m = 200,000 kg

Vertical Distance = h = 120 m

Speed = v = 14 m/s

Acceleration due to gravity = g = 10 m/s²

<u>Required:</u>

1) Gravitational Potential Energy = P.E = ?

2) Kinetic Energy = K.E. = ?

<u>Formula:</u>

1) P.E. = mgh

2) K.E. = $\displaystyle \frac{1}{2} mv^2$

<u>Solution:</u>

1) P.E. = (200,000)(10)(120)

P.E. = 240,000,000 Joules

P.E. = 240 Mega Joules

P.E. = 240 MJ

2) K.E. = 1/2 (200000)(14)^2

K.E. = (100000)(196)

K.E. = 19,600,000 Joules

K.E. = 19.6 MJ

$\rule[225]{225}{2}$

Hope this helped!

4 0

3 years ago