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If two identical objects move with the speed of 8m's and 32m's then what will be the ratio of their kinetic energy?
Wiki User
∙ 13y ago
(32/8)^2=16
Wiki User
∙ 13y ago
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What is the ratio of the kinetic energy if ball A has triple the mass and speed of ball B?
Triple the mass will triple the kinetic energy; triple the speed will increase it by a factor of 9 (32), so in total, ball A will have 27 times the kinetic energy of ball B.
Two bodies of equal masses are moving with uniform velocities v and 2v.Find the ratio of their of heir kinetic energies?
Kinetic energy is equal to the mass of the object times the velocity squared (Ek=.5mv2). To obtain the ratio between the two objects, divide the first by the second (Ek1/Ek2). This is equivalent to .5m1v12/.5m2v22. Since the masses are equal, they cancel out and you are left with v12/v22. Next, as stated in the problem, the seceond velocity is twice as much as the first so plug that coefficient into the aforementioned equation. (1v12)/(2v22). Since the values of velocity (v) are equal in this problem, they can cancel out just as the masses did. Now, 12=1 and 22=4; so the ratio is 1/4.
Mechanical energy is found by kinetic energy and potential energy.?
Mechanical energy is the combination of a system's total kinetic and potential energy. Kinetic energy is the energy of movement, is possessed by any objects in motion, and is given by the equation K = (1/2)mv^2. Potential energy has several types, including potential energy due to height (gravitational potential energy) and due to the tension inherent to a spring (elastic potential energy). Ug = mgh, where g is the acceleration due to gravity. Ue = (1/2)kx^2, where k is the spring constant and x is the distance the spring is stretched in meters. Although the universe follows the Law of Conservation of Energy, mechanical energy is not necessarily conserved. This means that mechanical energy can transform into other types of energy and vice versa. For example, when a machine operates, some mechanical energy is lost to heat energy. The ratio of mechanical energy conserved to the energy lost to thermal energy is known as efficiency, and no machines have 100% efficiency (no heat loss). On the other hand, non-mechanical energy such as electrical energy can convert to kinetic energy in situations when the electric potential of a capacitor powers the movement of a particle through the capacitor.
How the kinetic energy of an object changes when the speed of object doubles?
Kinetic energy at velocity "V" is (0.5) x mass x V x V Kinetic energy at velocity "2V" is (0.5) x mass x 2V x 2V Ratio of KE at velocity 2V and KE at velocity V is [(0.5) x mass x 2V x 2V] / [(0.5) x mass x V x V] = 4 So if the velocity double, KE quadruples
Why does refractive index not have units?
Because it is the ratio of two speeds (which will have identical units), the units cancel.
How do you find the ratio of kinetic energy?
The answer depends on what two (or more) things the ratio is meant to compare. The kinetic energy of several objects? The kinetic energy of an object compared to its total energy? The kinetic energy compared to its engine size?
Is the ratio of an objects mass to its volume called potential energy?
no
What is the ratio of the kinetic energy if ball A has triple the mass and speed of ball B?
Triple the mass will triple the kinetic energy; triple the speed will increase it by a factor of 9 (32), so in total, ball A will have 27 times the kinetic energy of ball B.
Consider a motorcycle of mass 150 kg one wheel of which has a mass of 10 kg and a radius of 30 cm What is the ratio of the rotational kinetic energy of the wheels to the total translational kinetic?
.067
A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field What is the ratio of the radii of their circular paths?
42.8
Two bodies of equal masses are moving with uniform velocities v and 2v.Find the ratio of their of heir kinetic energies?
Kinetic energy is equal to the mass of the object times the velocity squared (Ek=.5mv2). To obtain the ratio between the two objects, divide the first by the second (Ek1/Ek2). This is equivalent to .5m1v12/.5m2v22. Since the masses are equal, they cancel out and you are left with v12/v22. Next, as stated in the problem, the seceond velocity is twice as much as the first so plug that coefficient into the aforementioned equation. (1v12)/(2v22). Since the values of velocity (v) are equal in this problem, they can cancel out just as the masses did. Now, 12=1 and 22=4; so the ratio is 1/4.
Mechanical energy is found by kinetic energy and potential energy.?
Mechanical energy is the combination of a system's total kinetic and potential energy. Kinetic energy is the energy of movement, is possessed by any objects in motion, and is given by the equation K = (1/2)mv^2. Potential energy has several types, including potential energy due to height (gravitational potential energy) and due to the tension inherent to a spring (elastic potential energy). Ug = mgh, where g is the acceleration due to gravity. Ue = (1/2)kx^2, where k is the spring constant and x is the distance the spring is stretched in meters. Although the universe follows the Law of Conservation of Energy, mechanical energy is not necessarily conserved. This means that mechanical energy can transform into other types of energy and vice versa. For example, when a machine operates, some mechanical energy is lost to heat energy. The ratio of mechanical energy conserved to the energy lost to thermal energy is known as efficiency, and no machines have 100% efficiency (no heat loss). On the other hand, non-mechanical energy such as electrical energy can convert to kinetic energy in situations when the electric potential of a capacitor powers the movement of a particle through the capacitor.
How much work must be done on a 10 kg bicycle to increase its speed from 2 ms to 3 ms?
30 J
How much work must be done on a kg bicycle to increase its speed from 2 ms to 3 ms?
Kinetic Energy = 1/2 m V2At 2 m/s, the bicycle's KE is (1/2 x 10 x 4) = 20 joules.At 3 m/s, its KE is (1/2 x 10 x 9) = 45 joules.The difference in kinetic energy at the higher speed is (45 - 20) = 25 joules.That's the energy (work) that has to come from somewhere in order to achievethe higher speed.Check:The ratio of speeds is 3/2 = 1.5 . Since kinetic energy is proportional to the square of the speed,we need the square of the ratio to check. It's (1.5)2 = 2.25 .The ratio of the kinetic energies that we calculated at the two speeds is (45/20) = 2.25 .That's good enough for us. Check ! and mate
In atoms electrons and protons are in the same ratio or different ratio?
protons and electrons are identical in number in an atom
What is the ratio to an objects mass to its volume?
Density
What is an efficiency ratio?
The efficiency ratio for a machine usually refers to the ratio of the useful energy available from a machine and the energy put into it.
