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yuradex [85]
3 years ago
8

All of the following objects are moving at the same speed. which one bas the greatest kinetic energy? (remember kinetic energy d

epends on mass and speed)
a. car


b. semi tractor-trailer truck


c. motorcycle


d. bicycle
Physics
1 answer:
melomori [17]3 years ago
6 0

B, the semi-tractor trailer truck, since it has the most mass.

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Which property is closely related to its temperature
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A paper clip that has a mass of 1.5 grams is thrown into the air and initially has a kinetic energy
Vsevolod [243]

Answer:

v = 4.2 \ m/s

Explanation:

Given data:

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3 years ago
An object weighs 60.0 kg on the surface of the earth. How much does it weigh 4R from the surface? (5R from the center)
Alecsey [184]
"60 kg" is not a weight.  It's a mass, and it's always the same
no matter where the object goes.

The weight of the object is   

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On the surface of the Earth,

                   Weight = (60 kg) x (9.8 m/s²)

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Now, the force of gravity varies as the inverse of the square of the distance from the center of the Earth.
On the surface, the distance from the center of the Earth is 1R.
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                    (1R/5R)²  =  (1/5)²  =  1/25  =  0.04 of its value on the surface.

The object's weight would also be 0.04 of its weight on the surface.

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Again, the object's mass is still 60 kg out there.
___________________________________________

If you have a textbook, or handout material, or a lesson DVD,
or a teacher, or an on-line unit, that says the object "weighs"
60 kilograms, then you should be raising a holy stink. 
You are being planted with sloppy, inaccurate, misleading
information, and it's going to be YOUR problem to UN-learn it later.
They owe you better material.
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