What is the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 miles per second?

Answer 1

Ek = 1/2*m*v^2, where Ek is kinetic energy, m is mass, and v is velocity. Therefore, 1/2*20*2^2 = 40 Joules.

The formula Ek =1/2*m*v^2 can be used for any point mass, that is, a mass that is small enough that it can be considered to have all its mass in one point, or a solid object that is not rotating.

Answer 2

20 m/s ??

KE = 1/2mv^2

KE = 1/2(30 kg)(20 m/s)^2

= 6000 Joules

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KE = (1/2)mV2

KE = 1/2(30 kg)(20 m/s)2

= 6.0 X 103 Joules

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This seems to be a homework question, so I can't actually give the answer. But I can give the formula that would assist in getting the answer. Kinetic energy is equal to .5mv2. m is the mass and v is the velocity.
C: 6,000j what is the kinetic energy of an object that has a mass of 30 kilograms and moves woth a velocity of 20m/s
B. 5,880 j I make.it 6000 Joules. Half M = 15, V squared = 400.
Kinetic Energy:- The energy that a body posses by the virtue of its motion is known as kinetic energy. its simple ,when a particular body having a mass M kg moves with a velocity v m/sec Then ,the kinetic energy(Calculated in MKS(Meter Kilogram Second) system):- K.E. = (M*v2)/2 so, the solution to this question becomes- K.E. = (30 * 202)/2 K.E. =6000 Joules. or K.E. =6000 Newton meters.

Answer 3

Change 20 miles per second to meters per second.

20 m/s (1609 meters/1 mile)

= 32180 m/s

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KE = 1/2mV2

KE = 1/2(30 kilograms)(32180 m/s)2

= 1.6 X 1010 Joules

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Answer 4

Can't be answered.

You need to know the speed of an object to be able to calculate the kinetic energy.

no speed, no kinetic energy.

Answer 5

The object's kinetic energy is 6,000 joules.

Answer 6

Assuming this is a classical mechanics question,

KE = (1/2)mv^2 = (1/2)(20 kg)(2.8 m/s)^2 = 78.4 J

Answer 7

15 times the square of its velocity.

Answer 8

6,000 j