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2. {a} Distinguish between kinetic energy and gravitational potential energy in your own words. i 3 J (b) Calculate the kinetic energy of a 10
2. {a} Distinguish between kinetic energy and gravitational potential energy in your own words. i 3 J (b) Calculate the kinetic energy of a 10 g bullet travelling at a velocity of 25m kmih. l 3 i {cut toy rocket of mass 5 kg is launched upwards with sufcient speed to reach a maximum height of 25 m. (i) Calculate the launch speed of the toy rocket. (ii) Calculate the momentum of the toy rocket at a height of 20 m. (iii) Sketch a graph to show the variation of the kinetic energy of the toy rocket with height from the time the rocket was launch until it reached maximum height. l 1D) (d) Calculate the power required to raise a 21'.) kg object to a height of 10 m in 1 minute. What assumptions, if any, do you need to make to solve this problem? {4} { Total iJumfah: 2D)
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