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wolverine [178]

2 years ago

12

WILL GIVE BRAINLIEST

2 answers:

kaheart [24]2 years ago

8 0

Mass of girl =55kg
acceleration due to gravity =9.8m/s^2

So, the force she is applying on the floor must equal
55× 9.8 N
(Because force =mass ×acceleration)
=539N

Now, according to newton's third law the floor must be applying the same force on the body in the opposite direction.
So the force applied here by the floor is 539N upward.

Option "C" is the correct one.

Rudik [331]2 years ago

7 0

The answer is at least 539 N up

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Explanation:

It is given that,

Focal length of the concave mirror, f = -13.5 cm

Image distance, v = -37.5 cm (in front of mirror)

Let u is the object distance. It can be calculated using the mirror's formula as :

$\dfrac{1}{v}+\dfrac{1}{u}=\dfrac{1}{f}$

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u = -21.09 cm

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Answer:

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