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3 years ago

9

what is the work done by gravity when a 2.0kg ball falls to the floor from the height of 1.50m? Is it positive or negative? Expl

ain

1 answer:

Ratling [72]3 years ago

5 0

Positive because the ball is falling downwards.
Work done(Wd)= force x distance travelled in the direction of the force,
Wd=(2x9.8)x1.5

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When we go up From the earth surface.what happens about the atmospheric pressure

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Explanation:

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2 years ago

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3 years ago

Read 2 more answers

A horizontal force of 200 N is applied to move a 55 kg television set across a 10 m level surface. What is the work done by the

vivado [14]

Answer:

The work done is "2000 J".

Explanation:

The given values are:

Force,

F = 200 N

Mass,

m = 55 kg

Displacement,

d = 10 m

Now,

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⇒ $Work \ done= Force\times displacement$

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3 0

3 years ago

How much voltage is in the primary coil if there are 3200 windings in the

Lesechka [4]

Answer:

Voltage in primary coil is 3.91 V

Explanation:

For transformer we know that the working principle is given as

$\frac{V_1}{V_2} = \frac{N_1}{N_2}$

here we know that

$V_1 [tex] = voltage in primary coil[tex]V_2 = 25 V$

$N_1 = 500$

$N_2 = 3200$

Now we have

$\frac{V_1}{25} = \frac{500}{3200}$

$V_1 = 3.91 V$

8 0

3 years ago