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2 years ago

An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: )

2 answers:

7 0

KE = 1/2 * m * v2

We have to rearrange this so the subject is mass. (because the question asks for the mass of the object) :

Mass = (2 * KE) / v

Now input the values into this equation to get your answer :

Mass = (2 * KE) / v
Mass = (2 * 480) / 8
Mass = 960 / 8
Mass = 120

bulgar [2K]2 years ago

7 0

Answer:

Mass of an object is 15 kg.

Explanation:

It is given that,

velocity of an object, v = 8 m/s

Kinetic energy of an object, KE = 480 J

Kinetic energy of an object is due to the motion of an object. The mathematical relationship is given by :

$KE=\dfrac{1}{2}mv^2$

Where m is the mass of an object

$m=\dfrac{2\times KE}{v^2}$

$m=\dfrac{2\times 480\ J}{(8\ m/s)^2}$

m = 15 kg

Hence, the mass of an object is 15 kg

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2 years ago

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3 years ago

A box sliding on a horizontal frictionless surface runs into a fixed spring, compressing it a distance x1 from its relaxed posit

inn [45]

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Explanation:

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3 years ago

Which one is correct and why?

Gelneren [198K]

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'A' is the correct way to hook everything up.

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So the left side of the resistor is more positive, and the right side is more negative. The voltmeter is connected correctly in 'A', but it's backwards in 'C'. If you connect the voltmeter like in 'C' and turn things on, the voltmeter will try to go <em>down</em> from zero. You can't read the number on it, and It's possible that the voltmeter might be damaged.

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3 years ago