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Tanya [424]
3 years ago
12

A mass of 10 kg is at a point A on the table. It moved to a point B. If the line joining A and B is horizontal. What is the work

done on the object by the gravitational force ? Explain your answer
Physics
1 answer:
elena55 [62]3 years ago
6 0

Answer:

Work done by gravitational force = 0 joule

Explanation:

Work done is given by the relation

                        W  =  F   x    S   joule

Where,    F  -  the force applied in the form of push or pull

               S  -  displacement caused by the force

If a force is acting on a body and it doesn't cause any displacement, then work done will be zero.

Gravitational force acts on the body even if the body is at rest.

<em>Work done by the gravitational is applicable only if there is some vertical component of motion involved.</em>

In this case, some amount of work is done to move the body from point A to B.But, the body is displaced in the horizontal direction. No vertical motion is involved.

So, the work done due to gravitational force on a mass is zero joule.

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A man with a weight of 100 N is located
valentina_108 [34]

Answer:

Given,

  mass of man = 100 N = 10 kg

   height = h = 25m

   since the man does not move anything with his force, work done by him is zero

   work done on the man = gain in potential energy

   P.E=mgh

   P.E=10×9.8×25

  P.E=2.45KJ

Explanation:

so, potential energy gained by man is 2.45 KJ

5 0
2 years ago
Plz help with these 4
Airida [17]

Answer:

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Explanation:

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5 0
3 years ago
Read 2 more answers
A 1.40-kg ball tied to a string fixed to the ceiling is pulled to one side by a force F→ . where L = 1.40 kg. What is the tensio
riadik2000 [5.3K]

Answer:

T=13.72N

Explanation:

The tension before the ball is released have no angle is in rest at the same axis of the weight so:

∑F=0

Using Newton law in this case the ball is tied so tension before become to swing is

∑F=FN-T=0

T=F_{N}

T=m*g

T=1.40Kg*9.8\frac{m}{s^2}

T=13.72N

8 0
3 years ago
Two birds have the same mass but one has bigger feet. How would pressure that they produce on the ground be different ?
Mama L [17]

Answer:

the pressure per square inch is greater from the smaller feet.

Explanation:

different weight distribution

3 0
3 years ago
Calculate the resistance of an electric bulb which allows a 10 A current when connected to a 220 V power source
kodGreya [7K]

Resistance can be calculated by Ohm's law

As per ohm's law we will have

V = i * R

here we will have

voltage = 220 volts

current = 10 A

So by the above formula we will have

220 = 10* R

R = 22 ohm

So resistance of the bulb is 22 ohm.

4 0
3 years ago
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