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zavuch27 [327]
2 years ago
11

People often use simple machines like pulleys, levers, and ramps because they say the machine “makes the work easier.” Which of

the following statements about simple machines is true?
a.
Simple machines often reduce the amount of work to move an object.

b.
Simple machines often reduce the energy required to move an object.

c.
Simple machines often reduce the power consumed when moving an object.

d.
Simple machines often reduce the force needed to move an object.
Physics
1 answer:
dimulka [17.4K]2 years ago
3 0
I think the answer is D.
Hope this help
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Previous rocks melt and collide and to form igneous rocks.
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Igneous and sedimentary change by heat and pressure to form metamorphic rocks.
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3 years ago
What is the electric potential, i.e. the voltage, 0.30 m from a point charge of 6.4 x 10-C?
Gwar [14]

Answer:

V = 192 kV

Explanation:

Given that,

Charge, q=6.4\times 10^{-6}\ C

Distance, r = 0.3 m

We need to find the electric potential at a distance of 0.3 m from a point charge. The formula for electric potential is given by :

V=\dfrac{kq}{r}\\\\V=\dfrac{9\times 10^9\times 6.4\times 10^{-6}}{0.3}\\\\V=192000\ V\\\\V=192\ kV

So, the required electric potential is 192 kV.

3 0
3 years ago
Calculate the kinetic energy of a 750 kg compact car moving 50 m/s.
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Hope it helps
6 0
3 years ago
Calculating average speed
djverab [1.8K]

Average speed =

               (distance covered during some period of time)
divided by
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7 0
3 years ago
Suppose that instead of a long straight wire, a shortstraight wire was used. The distance from the wire to thepoint that the mag
vichka [17]

Answer:

Thus, if field were sampled at same distance, the field due to short wire is greater than field due to long wire.

Explanation:

The magnetic field, B of long straight wire can be obtained by applying ampere's law

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The magnetic field is obviously directly proportional to the current wire. From this expression.

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4 0
3 years ago
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