Leaderboard
Wiki User
Answered 2010-02-21 11:38:20
The formula for kinetic energy, Ek, could not be simpler.
Ek = (1/2)mv2, where m is mass (in kg) and v is velocity (in m s-1). If you prefer, you could write Ek = mv2/2.
or, 810j=1/2*20Kg*v2
or,v2=810j*2/20Kg
or,v=sqrt of 81
so,v=9m s-1
Your Answer
Still Have Questions?
Related Questions
What is kinetic energy measured in?
Kinetic energy is measured in joules
What units are kinetic energy measured in?
Joules, as energy is measured in joules.
What is the total mechanical energy of a glass of milk falling off a table at a time when its potential energy is 15j and its kinetic energy is 12j?
27 Joules
When an object falls which energy changes to?
As the object falls, it PEG or potential gravitational energy becomes kinetic energy. Before falling, it has for example 10 joules of PEG and 0 joules of Kinetic energy. As it falls, the PEG decreases and the kinetic energy increases, until it hits the ground, when all the energy is dispersed as sound, heat, etc.
What is the expression for kinetic energy?
joules
What is used to measure kinetic energy?
Kinetic energy is measured in the units of joules. Mostly all energy units are measured in joules.
A car has a mass of 2000 kg and is traveling at a speed of 30mpersec What is its kinetic energy in joules?
The car's kinetic energy is 900,000 joules.
What is the unit of measuring kinetic energy?
Joules, all energy is measured in joules.
Suppose a falling object loses 7J of potential energy. How much kinetic energy will it gain?
From what I understand: PE - Potential Energy (mgh) KE - Kinetic Energy (1/2 mv2) If one dismisses the friction with air (conservation of energy), a loss of 7 joules for potential energy means a gain of 7 Joules in kinetic energy.
What's the units for kinetic energy?
Joules (J)
A measure of the kinetic energy of the particles in an object?
joules
What is the measurement of kinetic energy?
Kinetic energy is measured in (J) Joules. J=Kgm2/S2
The kinetic energy of the object moving with a velocity of 5 meter per second is 25 joules. What will be the kinetic energy when the velocity is tripled?
The object has a mass of 2kg. When velocity is tripled the kinetic energy becomes 225 joules.
Can kinetic energy be measured in newtons?
No, kinetic energy is measured in Joules (J), as this is the SI unit for energy.
What is the measure of energy of motion?
Kinetic energy. It is measured in Joules.
What is a comparison of kinetic and potential energy?
They are both measured in Joules
What is the kinetic energy of an object with an mass of 5 grams and a velocity of 1000ms?
The object's kinetic energy is 2,500 joules.
When converting electrical energy to kinetic energy what is the unit of measure?
Joules
What are the similarities between kinetic and potential energy?
they are both measured in joules
How do you find joules?
To find joules, you have to multiply the force or newtons by distance in meters.
How do you measure the kinetic energy of atoms?
Kinetic energy of atoms is still an energy therefore it is generally measured in Joules (J)
How do you write 125 in kinetic energy?
The unit of Kinetic Energy is Joule. So, 125 KE can be written as 125 Joules.
What is the kinetic energy of an object that has a mass of 30 kilograms and move with a velocity of 20ms?
The object's kinetic energy is 6,000 joules.
What is the kinetic energy of a bicyclewith mass 10 kg traveling at a velocity of 3ms?
The bike's kinetic energy is 45 joules.
What is the kinetic energy of a bicycle with a mass of 14kg traveling at a velocity of 3 ms?
The bike's kinetic energy is 63 joules.
