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What is the kinetic energy of a 1000 kg car that is moving at 60 km per hour?
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∙ 11y ago
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∙ 11y ago
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What would the kinetic energy of a rock sitting on the ground be?
Zero. You need to think in terms of "frame of reference" as in what are you comparing the rock to. If you are an observer sitting next to the rock then the kinetic energy of the rock RELATIVE TO YOU is zero - I.E. the rock isn't moving relative to you and thus has no kinetic energy - energy of motion - relative to you. If you are an observer sitting a million miles from earth watching the rock then it is zipping around at 1000 miles per hour as the earth spins on its axis and it has significant kinetic energy RELATIVE TO YOU. You need to think in terms of "frame of reference" as in what are you comparing the rock to. If you are an observer sitting next to the rock then the kinetic energy of the rock RELATIVE TO YOU is zero - i.e. the rock isn't moving relative to you and thus has no kinetic energy - energy of motion - relative to you. If you are an observer sitting a million miles from earth watching the rock then it is zipping around at 1000 miles per hour as the earth spins on its axis and it has significant kinetic energy RELATIVE TO YOU. ---- So we don't get bored, no kinetic and no gravitational potential energy.
Which has more kinetic energy a motorcycle moving at 100km per hour or a truck moving at 100km per hour why?
KE = 1/2 mass *velocity squared A direct relationship. More mass, and a truck has more mass, and the more kinetic energy if velocities are held equal.
What is the kinetic energy if 23.5 grams is moving 81.9 kilometers per hour?
23.5 grams = 0.0235 kilograms 81.9 km per hour = 22.75 metres per sec. So kinetic energy = 1/2*Mass*Velocity2 = 6.081 Newtons
What is its kinetic energy when a 2000 kg car moving at twenty miles?
The answer will depend on the rate. 20 miles per day? per hour?
Which has the most kinetic energy a 1000 kg car traveling 30 ms or a car traveling 45 ms?
WOW, 5 MILES PER SECOND. I guess that I would have to calculate the miles per hour. To do this, we must multiply 5 miles per second times 3600(the number of seconds in an hour). That is 18000 miles per hour. I like to work in the SI system, so by converting this to meters per second, we get 8.04672E3 meters per second. Kinetic energy is defined as one half mvsquared. The Kinetic Energy is equal to 3.2374E10 Joules.
What is the kinetic energy of a Toyota Prius?
Kinetic energy is (1/2) x mass times velocity2. If the car is at rest, its kinetic energy is zero. If it is moving, look up its mass in kilograms, or do a reasonable estimate; assume a reasonable speed, in meters per second (for example, 20 meter per second; this is equivalent to 72 km/hour), and plug it into the above formula. The result will be in Joule.
What is the kinetic energy of a 2000 kg car that is moving at 50 km per hour?
Kinetic energy = (1/2) (mass) (speed)2KE = (1/2) (2,000) [ (50 km/hr) x (1,000 m/km) / (3,600 sec/hr) ]2= (1,000) (192.9) = 192,901.2 joules (rounded)
Why does an ocean liner traveling at 100km per hour would have more kinetic energy than a yacht traveling at the same velocity.?
The difference is the mass of the moving object: ocean liner some 10.000 to: yacht some 10 to Theory: W kin = kinetic energy m = mass v = velocity W kin = 1/2 * m * v² So the yacht would have to travel approx. 316 times faster than the ocean liner (when at 10 knots per hour) to have the same kinetic energy.
What has the most mechanical kinetic energy?
a car going 60 miles per hour
What objects has the most mechanical kinetic energy?
a car going 60 miles per hour
Describe the change in kinetic energy when the temperature of an object increases?
The more an objects kinetic energy increases the more it's temperature increases. An object that is traveling at 30 miles per hour will have a higher temperature than an object traveling at 10 miles per hour. This is in part due to friction. Mostly however, it is due to the fact that kinetic energy excites atoms in the object raising the objects temperature. You could put it like this: temperature = energy + atoms. Hope this helps.
How many joules of kinetic energy does a 750 kg car traveling at 65 mi hr have. By what factor would its kinetic energy decreases if the car travel half as fast?
For this question, we will use the formula K = 1\2 mv2. But first, we must convert the 65 miles per hour into meters per second. Multiply miles per hour by a factor of 1.609 to get kilometers per hour. Divide this answer by 3600 to get kilometers per second. Multiply this by 1000 to get meters per second. In this case, the velocity in meters per second is aproxamitely 29 meters per second. To get the kinetic energy, we multiply one half, times the mass 750 kg, times 292 meters per second. This yields 315375 Joules. If we halved the velocity, the kinetic energy would be one-fourth that of the original kinetic energy. This is because the velocity is squared. This holds true if we go to one third the original speed. Then it would be one-ninth of the original kinetic energy.
