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algol13
3 years ago
6

You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert a constant horizontal force

of 120 N , the sled has an acceleration of 2.3 m/s2 . Part A If the sled has a mass of 8.0 kg , what is the mass of your little sister
Physics
1 answer:
Tpy6a [65]3 years ago
4 0

Answer:

Mass of Little Sister = 44.17 kg

Explanation:

From Newton's second law of motion, the magnitude of force applied on the sled is given by the following formula:

F = ma

where,

F = Force Applied = 120 N

a = Acceleration = 2.3 m/s²

m = Mass of Sled + Mass of Little Sister = 8 kg + Mass of Little Sister

Therefore,

120 N = (2.3 m/s²)(8 kg + Mass of Little Sister)

(120 N)/(2.3 m/s²) = 8 kg + Mass of Little Sister

Mass of Little Sister = 52.17 kg - 8 kg

<u>Mass of Little Sister = 44.17 kg</u>

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Answer:

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The buoyancy and weight of the wood have to be equal for the system to be in equilibrium. The total mass (then, weight) of the wood is the same, so the total buoyancy has to be the same. Since buoyancy is the weight of the liquid displaced, the volume of liquid displaced will be the same in either case, which means that the water level will remain unchanged.

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if 6000j of energy is supplid to a machine to lift a load of 300N through a vvertical height of 1M calculatework out put​
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The potential difference between A and B is 5.0 V. A proton starts from rest at A. When it reaches B what is its kinetic energy?
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Answer:

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Explanation:

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