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3 years ago

15

A woman lifts her 100-newton child up one meter and carries her for a distance of 50 meters to the child's bedroom. How much wor

k does the woman do?

2 answers:

tankabanditka [31]3 years ago

5 0

100 J

Please mark me brainliest it would be greatly appreciated haha

garik1379 [7]3 years ago

5 0

Answer:

100 J

Explanation:

magic

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An apple weighs at 1N. the net force on the apple when it is in free fall is?

ololo11 [35]

The weight of an object <em>IS</em> the net force on it when it's in free-fall.

("Free fall" means that the only force acting on it is the force of gravity.
The force of gravity on an object is the force we call its "weight".)

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3 years ago

What is the acceleration of a rocket that speeds up from 50 m/s to 1000 m/s in 3 seconds?

tresset_1 [31]

Answer:

95 m/s^2

Explanation:

Givens

vi = 50 m/s

vf = 1000 m/s

t = 10 sec

a = ?

Equation

a = (vf - vi)/t

Solution

a = (1000 - 50)/10

a = 950/10

a = 95 m/s^2

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2 years ago

Two identical circular, wire loops 35.0 cm in diameter each carry a current of 2.80 A in the same direction. These loops are par

defon

Answer:

The answer is " $4659.2 \times 10^{-24} \ N$ "

Explanation:

The magnetic field at ehe mid point of the coils is,

$\to B=\frac{\mu_0 i R^2}{(R^2+x^2)^{\frac{3}{2}}}\\\\$

Here, i is the current through the loop, R is the radius of the loop and x is the distance of the midpoint from the loop.

$\to B=\frac{(4\pi\times 10^{-7})(2.80\ A) (\frac{0.35}{2})^2}{( (\frac{0.35}{2})^2+ (\frac{0.24}{2})^2)^{\frac{3}{2}}}\\\\$

$=\frac{(12.56 \times 10^{-7})(2.80\ A) \times 0.030625}{( 0.030625+ 0.0144)^{\frac{3}{2}}}\\\\=\frac{ 1.07702 \times 10^{-7} }{0.0095538976}\\\\=112.730955 \times 10^{-7}\\\\=1.12\times 10^{-5}\ \ T\\$

Calculating the force experienced through the protons:

$F=qvB=(1.6 \times 10^{-19}) (2600)(1.12 \times 10^{-5})= 4659.2 \times 10^{-24}\ N$

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3 years ago

A mass M tied to a light string is moving in a vertical circle. The tension in the string at the top is TT and TB at the bottom

natita [175]

Answer:

Explanation:

Tension provides centripetal force in the circular motion . In circular motion work done by force = torque x angle

torque is zero as , centripetal force passes through axis of rotation that is center.

So work done by centripetal force = 0

So work done by tension on M = 0

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2 years ago

Refraction occurs when __________.

ser-zykov [4K]

Refraction occurs when a wave enters a new medium and changes its speed.

i hope this helps

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3 years ago

Read 2 more answers