375 Js (((((((((((: this is the right answer
Work done = increase in kinetic energy ie 1/2 * 10 * (3+2)(3-2) [recall a2 - b2 = (a+b)(a-b)] Hence work done = 25 joule.
Work done = Increase in kinetic energy SO W = (1/2) m (v22 - v12) So W = 12 x 5 x 3 = 180 J
Her average speed was 10 m/s. You probably missed something in the question, there isn't enough there to determine "how much it increased by".
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.
The work done on the snowboard to increase its speed is 100 Joules. This work-energy theorem is based on the change in kinetic energy, given by the equation: work = change in kinetic energy. In this case, the snowboard has a mass of 10 kg and the speed increases from 2 m/s to 4 m/s.
The work done on the snowboard can be calculated using the work-energy theorem. The work done is equal to the change in kinetic energy of the snowboard. Given the mass of 5kg and initial and final speeds of 2m/s and 4m/s respectively, the work done on the snowboard is 100 Joules.
The work done on the snowboard is calculated as the change in kinetic energy. The formula for kinetic energy is KE = 0.5 * mass * velocity^2. By calculating the initial and final kinetic energies, the work done would be the difference between the two. In this case, the work done on the snowboard is 60J.
225000 J
The work done on the snowboard is equal to the change in kinetic energy. The initial kinetic energy is (1/2)mv^2 = (1/2)(10 kg)(4 m/s)^2 = 80 J. The final kinetic energy is (1/2)(10 kg)(6 m/s)^2 = 180 J. Therefore, the work done is 180 J - 80 J = 100 J.
To calculate the work done on the sled to increase its speed, you need to know the initial and final kinetic energy. The work done is equal to the change in kinetic energy, which is given by the formula: Work = (1/2) * m * (vf^2 - vi^2) Substitute the mass of the sled, initial speed, and final speed to find the work done.
The work done is equal to the change in kinetic energy of the snowboard. The formula for kinetic energy is KE = 0.5 * mass * velocity^2. The initial kinetic energy is KE_initial = 0.5 * 10 kg * (2 m/s)^2 = 20 J, and the final kinetic energy is KE_final = 0.5 * 10 kg * (4 m/s)^2 = 80 J. The work done is the difference: Work = KE_final - KE_initial = 80 J - 20 J = 60 J.
3000j
312.5 J
You can look for a cheaper ride snowboard in online shops
3000 J *Shelby Sarah*
750 j