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How is friction good and bad?
Friction is good because it provides traction. Friction is necessary for people to stand, or for vehicles to accelerate or break. Friction can also be used to convert kinetic energy to heat or electrical energy. Friction can be bad because kinetic energy is can be lost to friction.
How do you find the mass when given speed and kinetic energy?
You solve the equation for kinetic energy for mass. KE = (1/2) m v2 (1/2) m v2 = KE m = 2 KE / v2
How much work has to be done on a 5 kg sled to increase its speed from 10 m s to 15 m s?
Work is simply a transfer of energy. Calculate the kinetic energy for both speeds, then calculate the difference. The formula for kinetic energy is KE = (1/2)mv2. If the mass is in kilograms, and the velocity (or speed) is in meter/second, the energy is in Joule.
What is the equation for a falling object?
The equation for the kinetic energy of a falling object is kinetic energy=1/2 an object's mass multiplied by it's speed squared. From this, we can work out the speed. First you need to know its weight and its kinetic energy. The kinetic energy is obtained by working out it's potential energy before it fell (Potential energy= mass multiplied by gravitational pull multiplied by height. Then, at whatever point during the fall, the decrease in potential energy marks the increase in kinetic energy. From then we work out the speed. Example; An object that weighs 8.1 kilograms is 10 metres above the ground. It's potential energy is therefore 8.1x10(gravitational pull on earth is always 10)x10. So it has a potential energy of 810 joules. it falls 5 metres, so it's potential energy is 8.1x10x5 (405 joules). The total energy, we know, is 810J, so 810-a05=405, giving it kinetic energy of 405J. The kinetic energy formula is then rearranged as speed squared=kinetic energy/ 0.5m. Our equation is therefore speed squared= 405/4.05, so speed squared=100. The square root of 100 is 10 so the speed is 10 metres per second (36 kilometres per hour).
What does independent variable and dependent variable mean and what they do?
It means that you can change one variable (the independent variable) freely, but that the other variable (the dependent variable) depends on the independent variable. For example, to calculate kinetic energy, the energy (for a given object) depends on the speed; if you change the speed, you change the kinetic energy. You can't change the kinetic energy directly, only indirectly by changing the speed.
Do you have an equation to calculate kinetic energy?
KE=1/2mvsquared
How do you calculate the kinetic equation when H2O2 exist in environment?
Not enough information
You can calculate kinetic energy by using the equation what?
KE=1/2*m*v2whereKE is kinetic energym is the massand V is the velocity
How do you calculate the gain of Kinetic Energy?
The gain in kinetic energy can be calculated using the equation: ΔKE = KE_final - KE_initial, where KE is the kinetic energy. Simply subtract the initial kinetic energy from the final kinetic energy to determine the gain.
The work required to accelerate an object on a frictionless surface from a speed v to a speed 2v is?
The work required to accelerate an object from speed v to 2v on a frictionless surface is equal to the change in kinetic energy, which can be calculated as 3/2 times the initial kinetic energy. This increase in kinetic energy corresponds to the work done by the force causing the acceleration.
How can one calculate thermal energy from kinetic energy?
To calculate thermal energy from kinetic energy, you can use the equation: Thermal energy 1/2 mass velocity2. This formula relates the kinetic energy of an object (determined by its mass and velocity) to the thermal energy it produces.
Why Does kinetic energy increase as speed increases?
Kinetic energy is directly proportional to the square of an object's speed. As speed increases, the object has more momentum and therefore more kinetic energy. This is because kinetic energy is a measure of the work required to accelerate an object to a certain speed.
How do you calculate displacement of an object using the work-energy equation?
To calculate displacement using the work-energy equation, first calculate the work done on the object using the force applied and the distance moved. Then, equate the work done to the change in kinetic energy of the object using the work-energy equation: Work = Change in kinetic energy = 0.5 * mass * (final velocity^2 - initial velocity^2). Finally, rearrange the equation to solve for displacement.
Calculate the speed of a 500 keV electron?
To calculate the speed of a 500 keV electron, you first need to convert the kinetic energy to joules (1 keV = 1.602 x 10^-16 J). Then, you can use the equation for kinetic energy: KE = 0.5 * m * v^2, where KE is the kinetic energy, m is the mass of the electron, and v is the speed. Rearrange the equation to solve for v.
How to calculate the work function of a material?
To calculate the work function of a material, you can use the equation: Work Function Planck's constant x Frequency of incident light - Kinetic energy of emitted electrons This formula takes into account the energy required to remove an electron from the material's surface. The work function is typically measured in electron volts (eV).
How factors are used to calculate the kinetic energy of an object?
KE = (1/2)mv2 where m = mass (in kilograms), and v = velocity (in meters/second) this gives you the kinetic energy in units of Joules
What is the KE of a 6kg mass at 4?
To calculate the kinetic energy, you need to know the speed of the mass in addition to its mass. The kinetic energy equation is KE = 0.5 * m * v^2, where m is mass and v is velocity. Without the speed of the mass, the kinetic energy cannot be determined.
