Work Is Calculated As Force X Distance

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Pg 377: Answer 1: Exerting a force does not imply that work is done. Work is calculated as Force x Distance. Work is said to be done on an object when the force on the object causes the object to move some distance. Ife the object does not move, no work is done immaterial of how much force is exerted. There are many situations when force is exerted but work is not done. For example, if you hold a piece of wood while helping in a project, effort is done to hold the wood in place, but since the force doesn’t cause the wood to move, work is not said to be done. The force has to be in the direction of motion to require work to be done. Answer 2: The formula for calculating work is: Work (J) = Force (N) x Distance (m) Thus, the amount of work done can be determined by multiplying Force with Distance. Answer 3: Here two scenarios are given. a. Force of 2N moves an object 3 meters: Here work is calculated as: W = F x D = 2N x 3m = 6 Nm (6 Joules) b. Force of 3N moves an object 2 meters: Here work is calculated as: W = F x D = 3N x 2m = 6 Nm (6 Joules) Thus, in both cases, the work done is same, i.e. 6 Joules. Answer 4: Here, we need to move 5 large cans of paint from basement to the second floor. Let us assume that the Force for lifting one can is 1N and the height of one floor is 1m. Thus, the below two scenarios are taken as: a. When all the cans are lifted and taken to second floor all at once, the calculation for work done is: W = 5N (5 cans each of 1N) x 2m (2 floors each
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