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A 2 kg object is dropped from a height of 12 m Using the conservation of energy calculate the speed it has at the end of the 12 m fall?
Wiki User
∙ 12y ago
Use the formula KE = (1/2)mv2 (kinetic energy equals 1/2 times mass times the square of the velocity).
Use the formula KE = (1/2)mv2 (kinetic energy equals 1/2 times mass times the square of the velocity).
Use the formula KE = (1/2)mv2 (kinetic energy equals 1/2 times mass times the square of the velocity).
Use the formula KE = (1/2)mv2 (kinetic energy equals 1/2 times mass times the square of the velocity).
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoUsing conservation of energy means that potential energy is being converted into kinetic enegy and you can set the two equations equal.
PE = gmh and KE = 1/2mV2 become
gmh = 1/2mV2
mass can be algebraically eliminated
gh = 1/2V2
(9.8 m/s2)(12 m) = 1/2V2
117.6 = 1/2V2
multiply through by 2
235.2 = v2
take square root both sides
15 meters per second = velocity
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Wiki User
∙ 14y agoUse the formula KE = (1/2)mv2 (kinetic energy equals 1/2 times mass times the square of the velocity).
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What is the kinetic energy of an object weighing 65 kg dropped from a height of 40m?
Kinetic energy is dependent on which point you are talking about. When it is about to be dropped, kinetic energy is zero. When it reaches almost hits the ground, there is maximum kinetic energy.
What happens to the object's potential energy when it is dropped?
When an object is dropped, its potential energy decreases. This is because potential energy is a result of an object's position or height above the ground. As the object falls, it loses height, which leads to a decrease in potential energy. At the same time, the object gains kinetic energy, which is the energy of motion.
Why does boiling water make a thumping sound when dropped from a height on the floor from a jug or mug as compared to cold water?
molecules in hot water possess a high kinetic energy that is why vibrate vigorously when hot water is dropped from height on the floor the molecules of water transfer their energy to that of floor as a result floors molecules start vibrating,may be that is why we hear this thumping sound.
What is the kinetic energy of a 2.512 gram penny is dropped from a height of 16.76 m the instant it strikes the ground?
2.512 x 10 x 16.76 - 421.0112
What newtons law explains why a ball bounces?
when a ball is dropped it hits the floor and the ball is flattened. That creates energy. The only way the ball can release the energy is bouncing back up. But the ball starts to lose its height and the ball eventually loses its energy and comes to a stop.
A dropped ball doesn't bounce back to its starting height how does this situation fit the law of conversation of energy?
According to the scientific law of conservation of energy the energy can be sustained by the bouncy ball indefinitely
What is the gravitational potential energy to a car that is 1500kg and is dropped from 50 meters?
After the car is dropped, it has NO gravitational potential energy.Before it's dropped, you can calculate the potential energy as mgh (mass x gravity x height). You can use 9.8 for gravity.
Is there a link between the height the ball is dropped from and the height to which it bounces?
Yes. Under ideal circumstances - no air resistance, elastic collision (i.e., perfect bounce), the ball should bounce back to the same height from which it was dropped, due to conservation of energy. In practice, some energy is always lost, both due to air resistance and to a non-perfect bounce.
Does gravitational acceleration calculate potential energy?
Gravitational potential energy describes how much energy a body has in store by virtue of having been elevated to a specific height. The formula to calculate gravitational potential energy is:.U = mgh.Where:U is the potential energym is the mass of the objectg is the acceleration due to gravity, andh is the height the object will fall if dropped.
What is the kinetic energy of a ball when it is dropped from a height and it falls on a table?
it is the difference of the potential energy when the body is on the table and from the position where it is dropped.
Can a ball rebound to a height greater than the height from which is was dropped?
no,due to physics the rebound weight and energy
What best describes the object's energy as it falls trough the air from the stationary position at height x?
The potential energy it had at height x when it was not moving is equal to the kinetic energy it will have as it is falling. Why? Law of the Conservation of Energy. Energy before will equal energy after.
An object with a mass of fifteen kilograms is dropped from a building neglecting friction which is the buildings height?
It's not possible to calculate the answer with the information given.An object with a mass of 15 kg can be dropped from a building of any height.
The impact energy of a mass 0.9kg is 7kgm at what height is the mass dropped at?
7.78 M.
What is the kinetic energy of an object weighing 65 kg dropped from a height of 40m?
Kinetic energy is dependent on which point you are talking about. When it is about to be dropped, kinetic energy is zero. When it reaches almost hits the ground, there is maximum kinetic energy.
How do you calculate change in energy?
The change in potential energy is equal to mass*gravity*change in height
What 3 thing are necessary to calculate potiential energy?
Height & weight.
