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A 1600-kg car travels at a speed of 12.5 mass per second. what is its kinetic energy?

Posted 237 day ago

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Answers (4)

Amarjeet 		Kinetic Energy = 1/2 mass x velocity square = 1/2 1600 x 12.5x12.5 joules

Posted 214 day ago

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jayteacher 		First, a speed is never given in mass per second. Look at the problem again before answering.

If the speed is given in meters per second, then no conversion rates are necessary.

The formula for Kinetic Energy is KE = (1/2)*m*(v^2) with m given as mass in kilograms and v given as velocity (or speed in a scalar unit of measure) in meters per second.

Therefore, KE = (1/2)*1600*(12.5^2) = 800*156.25 = 125000 J (J stands for Joules)

Posted 229 day ago

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asad.taj 		mass m = 1600 kg
velocity or speed v = 12.5 meter/second
formula for kinetic energy k.e. = 1/2 m.v2
therefore
k.e. = 1/2*1600*12.52
= 800*156.25
= 125000 joule


Posted 231 day ago

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You probably mean 12.5 meters per second for the speed.

In this problem speed is the same as velocity
Kinetic Energy = 1/2 * mass * velocity ^2 velocity^2 means velocity squared.
= 1/2 * 1600 kg * (12.5 m / sec)^2
= 800 kg * 156.25 m^2 / sec^2
= 125,000 kg m^2 / sec^2
= 125,000 (kg * m / sec^2) * m
= 125,000 Newton * m
= 125,000 Joules

Posted 237 day ago

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