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2 years ago

15

What is the weight of an object (mass = 60 kilograms) on Mars, where the acceleration due to gravity is 3.75 meters/second2?. Se

lect one of the options below as your answer:. A. 1.6 newtons. B. 16 newtons. C. 22.5 newtons. D. 225 newtons. E. 2250 newtons.

1 answer:

german2 years ago

6 0

Weight = mass * gravity = 60 kg * 3.75 m/s² = 225 N

<span>Option D.</span>

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To solve this problem it is necessary to apply Boyle's law in which it is specified that

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Where,

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The final pressure here is the atmosphere, then

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A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is placed on top of the first bl

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By Newton's second law, assuming <em>F</em> is horizontal,

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• the net <u>vertical</u> force on the <u>larger</u> block is

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where 4<em>mg</em> is the mag. of the normal force of the surface pushing up on the combined mass of the two blocks, 3<em>mg</em> is the weight of the larger block, and <em>mg</em> is the weight of the smaller block;

• the net <u>horizontal</u> force on the <u>smaller</u> block is

<em>µmg</em> = <em>ma</em>

where <em>µmg</em> is again the friction between the two blocks, but notice that this points in the same direction as <em>F</em>. It is the only force acting on the smaller block in the horizontal direction, so (b) static friction is causing the smaller block to accelerate;

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<em>mg</em> - <em>mg</em> = 0

where <em>mg</em> is the magnitude of both the normal force of the larger block pushing up on the smaller one, and the weight of the smaller block.

(You should be able to draw your own FBD's based on the forces mentioned above.)

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You throw a Frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the Fris

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2 years ago

A 2 kg stone is tied to a 0.5 m string and swung around a circle at a constant angular velocity of 12 rad/s. the angular momentu

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Starting from the angular velocity, we can calculate the tangential velocity of the stone:
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Then we can calculate the angular momentum of the stone about the center of the circle, given by
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