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ElenaW [278]
2 years ago
11

uniform mementum mas is 90g is pivoted at 40cm mark if the metra rula ia in equilibrium with an mark unknown mass m place at the

10cm mark and mass of 73g place at 70cm .ditermine the value of m when mass of an object is always at it center of gravity​

Physics
1 answer:
Cerrena [4.2K]2 years ago
6 0

Answer:

Unknown mass, m = 14 \textrm{ g}

Explanation:

From the figure below,

OE is a meter scale with markings in centimeter.

A is the position of unknown mass m, B is the position of 90 g mass, C is the fulcrum, D is the position of mass 73 g.

Length AC = 40 cm, BC = 10 cm, CD = 20 cm

For equilibrium of the meter scale,

Sum of anti-clockwise moments = Sum of clockwise moments

F_{A}\times AC+F_{B}\times BC=F_{D}\times CD\\m\times 40+90\times10=73\times20\\40m+900=1460\\40m=1460-900\\40m=560\\m=\frac{560}{40}=14\textrm{ g}

Therefore,unknown mass is 14 g.

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A dog walks 12 meters to the east and then 16 meters back to the west for this motion what is the distance moved What is the mag
FinnZ [79.3K]

The distance is 28 meters, and the displacement is -4.

For the distance it would be 12 + 16 = 28.

For the displacement it would be 12 - 16 = -4.

would really appreciate a brainliest! Hope this helped!

6 0
3 years ago
A projectile is fired directly upward from the ground with an initial velocity of 112 f/sec its distance s above the ground afte
Travka [436]

Answer:

3.48 seconds

Explanation:

At maximum height Vf=0 m/s

Vf= Vi - g*t

⇒g*t= Vi

⇒t= Vi/g

⇒t= 112/32.17 sec

⇒ t= 3.48 s

so the projectile will achieve its maximum height in 3.48 seconds.

7 0
2 years ago
An object is located 50.0 cm from a concave mirror. The magnitude of the mirror focal length is 25.0 cm. What is the image dista
ioda

Answer:

Correct answer: C. 50 cm

Explanation:

Given data:

The distance of the object from the top of the concave mirror o = 50.0 cm

The magnitude of the concave mirror focal length 25.0 cm.

Required : Image distance d = ?

If we know the focal length we can calculate the center of the curve of the mirror

r = 2 · f = 2 · 25 = 50 cm

If we know the theory of spherical mirrors and the construction of figures then we know that when an object is placed in the center of the curve, there is also a image in the center of the curve that is inverted, real and the same size as the object.

We conclude that the image distance is 50 cm.

We will now prove this using the formula:

1/f = 1/o + 1/d => 1/d = 1/f - 1/o = 1/25 - 1/50 = 2/50 - 1/50 = 1/50

1/d = 1/50 => d = 50 cm

God is with you!!!

6 0
3 years ago
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What is an advantageous disadvantage of generating electricity using a hydroelectric power station rather than wind turbines ?
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The disadvantages of using a hydroelectric power station is that it can be very deadly and cause damage to towns if it overfills or falls apart releasing all the water. Since nothing lasts forever, eventually they will break apart and would require everyone to evacuate before doing so. Another disadvantage is that it disrupts migration of animals that live in the water such as fish.

It's better than wind turbines because wind turbines require a lot of wind to turn and on days without wind, very little energy can be produced.

7 0
3 years ago
1. Two charged objects have a repulsive force of 2 N. If the charge of one of the objects is doubled, then the new force will be
GrogVix [38]

Answer:

4 N

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3 years ago
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