When released, this energy is converted into kinetic energy such that the arrow will have 50 J of kinetic energy upon being fired. When released, the arrow will have a kinetic energy of _ Joules.Ī drawn arrow has 50 J of stored energy due to the stretch of the bow and string. ![]() An arrow is drawn back so that 50 Joules of potential energy is stored in the stretched bow and string. Since the 2400-kg car weighs 2X as much as the 1200-kg car, it would require twice as much work to lift it the same distance.ĭefinition and Mathematics of Work | Calculating the Amount of Work Done by Forcesġ2. The force required to raise the car at constant speed is equivalent to the weight (m*g) of the car. The amount of work done by a force to displace an object is found from the equation W = F*d*cos(Theta) Lifting the more massive car requires _ work. A 1200 kg car and a 2400 kg car are lifted to the same height at a constant speed in a auto service station. NOTE: The next 15 questions presume that the value of g is 10 m/s/s.ġ1. ![]() The Review Session » Work and Energy Packet » Answers Q#11-25 Work and Energy Review
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