10. The kinetic energy Ex in joules J, of a moving object can be expressed as Ex = - mv , where m is the
10. The kinetic energy Ex in joules J, of a moving object can be expressed as Ex = - mv , where m is the mass in kilograms kg , and v is the speed at which the object is moving in metres per second m/s . If the kinetic energy of a 2.5 kg object is 1150 J , determine the speed of the object to the nearest tenth of a m/ s. (2 marks)
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