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« B          Main » Mechanical Energy » Kinetic Energy » QuestionsII_3_1   ### Kinetic Energy - Questions II.3.1

 Determine the kinetic energy of a 1200 kg roller coaster car that is moving with a speed of 15 m/s. If the car in part a) was moving with three times the speed, what would be its new kinetic energy? A 2.0 kg boulder is dropped from a height of 5.0 m. What is the kinetic energy of the boulder as it hits the ground? A 12.0 N object has kinetic energy of 275 J. What is the speed of the object? How much work must be done to accelerate a 0.20 kg hockey puck from 11 m/s to 17 m/s? A 3.0 kg box was lifted vertically and then dropped. How much work was required to lift the box 75.0 m? If the box was dropped from a height of 75.0 m, what would its kinetic energy be just before it reached the ground? What would its velocity be just before it hit the ground? A 0.25 kg hockey puck is traveling at 18.0 m/s. What is its kinetic energy? In order to achieve a velocity of 18.0 m/s, how much work was done? Download:          