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Physics Chap4

Homework questions

QuestionAnswer
Define work and give the formula. Work is the product of a force exerted on an object and the distance the object moves in the direction of the forces. w= Fxd
What are the necessary conditions for work to be done? Force acting on the object is perpendicular to the motion.
What is the formula used for calculating work done against the force of gravity? w= Wtxh
Define power. The rate of doing work and can be expressed P=w/t
Define energy. An objects ability to do work.
How Newton's second law of motion expressed? F=mxa
Define Mass. The quantity of matter contained by an object.
Define acceleration. the rate of change of velocity; linear distance per time.
Define velocity. a measure of linear distance per time
Define force. a vector that produces or prevents motion.
Define potential energy and give the formula. Energy of an object due to its position of configuration. PE=mxgxh
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