Physics, 23.05.2021 14:00 clarissajimenez27
2. A boy kicks the football of mass 500 g which is initially at rest. It starts moving with a
constant velocity of 5 m/s . Calculate:
(a) the kinetic energy of the boy
(b) the work done by the boy
[Ans.(a) 6.25 J. (b) 6.25 ]
Answers: 1
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Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j
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Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency
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2. A boy kicks the football of mass 500 g which is initially at rest. It starts moving with a
const...
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