A2.5-kg box, sliding on a rough horizontal surface, has a speed of 1.2 m/s when it makes contact with a spring. the block comes to a momentary halt when the compression of the spring is 2.0 cm. the thermal energy generated by friction, from the instant the block makes contact with the spring until it comes to a momentary halt, is 0.5 j (b) what is the coefficient of kinetic friction between the box and the rough surface?
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The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force
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If forces acting on an object are unbalanced. true or false
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1) a child holds two dogs on two separate leads. the dogs are pulling in different directions. one is pulling a force of 20n north and one is pulling 15n eastwards. calculate the resultant force on the child. state the direction. (use the parallelogram of forces) 2) a force of 20n acts horizontally on an object. a second force of 5n acts at 60 degrees to the first one. calculate the resultant force. worth 20 points, need answers asap with method you x
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A2.5-kg box, sliding on a rough horizontal surface, has a speed of 1.2 m/s when it makes contact wit...
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