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love history [14]
3 years ago
13

For an extended object, the weight force can be considered to act at which point?

Physics
1 answer:
JulsSmile [24]3 years ago
5 0

Answer:

At the center of the object

At the end of the object farthest away from the ground

At the center of gravity of the object

At end of the object closest to the ground

Explanation:

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Yeah we always see the same side of the moon because it orbits around earth with that side constantly facing earth, if that's not your question than just comment and i'll try to answer...
3 0
4 years ago
Read 2 more answers
A. The potential energy stored in the compressed spring of a dart gun, with a spring constant of 62.00 N/m, is 0.940 J. Find by
valina [46]

a. The spring is compressed  by  0.174 m.

b.  The vertical distance the dart travels from its position when the spring is compressed to its highest position is 9.6 m.

c. The horizontal velocity of the dart at that time is  13.74 m/s.

d. The horizontal distance from the equilibrium position at which the dart hits the ground is 19.236 m.

<h3>What is potential energy?</h3>

The energy by virtue of its position is called the potential energy.

a. Given is the potential energy stored in the compressed spring of a dart gun, with a spring constant of 62.00 N/m, is 0.940 J.

PE  of spring = 1/2 kx²

Put the values, we get

P.E = 0.940 = 1/2 x 62 x²

x = 0.174 m

Thus, the spring is compressed by 0.174 m.

b. Given is a 0.010 kg dart is fired straight up.

The vertical height is find out by

0.940 J = (0.010 kg) (9.8 m/s²) h

h = 9.6 m

Thus, the vertical distance the dart travels from its position is 9.6 m

c. From the conservation of energy principle, total mechanical energy is conserved.

1/2 mv² =mgh

v = √2gh

Plug the values, we get

v = √2 x 9.8x 9.6

v = 13.74 m/s

Thus, the horizontal velocity is  13.74 m/s.

d.  Time that dart spends in air, t = √2h/g

t = √(2x9.6)/9.81

t = 1.4 s

The horizontal distance from the equilibrium position at which the dart hits the ground.

Horizontal distance = (Velocity on x direction) x time

Horizontal distance = 13.74 m/s x 1.4s

Horizontal distance = 19.236 m

Thus, the horizontal distance is 19.236 m.

Learn more about potential energy.

brainly.com/question/24284560

#SPJ1

7 0
2 years ago
What are properties of what and there importance
kirill [66]

Answer:

Physical and chemical properties

Explanation:

There are different types of properties

<u>Physical properties</u>

The physical properties of matter are those characteristics specific to the substance, to be observed or measures do not produce new chemical species, for example:

Smell, color, taste, crystalline shape, temperature melting temperature, boiling temperature, density, viscosity, surface tension, vapor pressure, solubility, hardness, brightness, malleability, ductility, conductivity, etc.

<u>Chemical properties</u>

The chemical properties of matter are those which, when observed or measured, produce new chemical species, by

example: reactivity to oxygen, water or acid.

And these are classified as follows.

Properties that do not depend on the amount of substance considered are called intensive properties, such as melting temperature or density. The so-called extensive properties are those that depend on the amount of material substance, such as volume or mass.

Intensive properties are also called specific because they are characteristics that make it possible to differentiate one substance from another. Also, extensive properties are known as general properties because they are present in all kinds of substance and do not allow them to be differentiated from each other.

On the other hand, chemical properties are those whose measurement implies a change in composition, usually irreversible. Flammability or that a substance is easily oxidized are chemical properties.

5 0
4 years ago
Can I have some help please with any of the questions
vovangra [49]

6b: impulse is change in momentum. Change in momentum p=m[v(final)-v(initial). Final velocity is zero and initial velocity is the one you calculated before impact: -15.7 since it’s going down. Now plug in numbers and you get 78.5 in the upward direction.

6c: change in momentum p=Ft. we already calculated change in momentum. So plug it into equation and solve for t. 78.5/655= 0.119 s

Apply the same idea for question 7. Hope this helped

3 0
3 years ago
What do you know about water
Romashka-Z-Leto [24]

Answer:

  1. It is vital for all known forms of life.
  2. It provides no calories nor organic nutrients.
  3. It forms precipitation in the form of rain and aerosols in the form of fog.
  4. It's chemical symbol is H₂O

Explanation:

HOPE THAT HELPS

PLEASE MARK AS BRAINLIEST

7 0
3 years ago
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