A person of mass 40 kg picked up a bag of mangoes and climbed ten steps . If the bag contains ten mangoes , each of mass `0.5` kg and the height of each step is 10 cm , then find the work done by the person in carrying that till tenth step (Take g = `10 m s^(-2)`).
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Three particles, each of mass m and carrying a charge q each, are suspended from a common point by insulating mass-less strings each of length L. If t
Correct Answer - `3.16xx10^(-9)C`
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Due to a rise of `12%` in the price of mangoes a dealer gets 27 kg less for Rs. 24750. Find (a) The new price per kg of mangoes. (b) The orginal price
Correct Answer - Rs. 110; Rs. 98
2 Answers 1 views
The length of a cuboid is 2 cm more than its height, whereas its breadth is 2 cm less than the height. Its height is equal to the side of a square hav
Correct Answer - 960 `cm^(3)`
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The work done by a boy in lifting his bag up to a height of 2 m is 200 J . Find the mass of his bag (Take g = 10 ` m s^(-2)`).
Correct Answer - 10 Kg
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A rice bag of 100 kg is lifted up by four workers to a height of 10 m from the groud . Find the work done by each worker (Assume that four workers mus
Correct Answer - `25 xx 10^(2) J`
2 Answers 1 views
20. A coconut of mass \( 2 Kg \) is falling from a coconut free of height \( 10 m \). Find the potential energy, kinetic energy and total energy at the following points. \( \left( g =10 m / s ^{2}\right) \) a) Before falling from the coconut tree. b) Just before hilting the ground. c) At a height \( 4 m \) from the ground. d) Which law is evident from this example?
(a) Given m = 2 kg h = 10 m Potential energy at before falling from the coconut tree. u = mgh u = 2 x 10 x 10 u = 200 joule Kinetic energy will...
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A Man has 1500 to purchase rice and wheat. A bag of rice and a bag of wheat cost 180 and 120 respectively. He has a storage capacity of 10 bags only.
Correct Answer - 5 bages of each
2 Answers 2 views
A bag contains 4 green and 6 white balls. Two balls are drawn one by one without replacement. If the second ball drawn is white, what is the probabili
Correct Answer - `5/9`
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a). Name the process and steps in the process of identifying and choosing the best person out of a number .
(a).Selection Steps in the process of selection discussed: 1. Preliminary Screening. 2. Selection Tests. 3. Employment interview (b). Next two steps: 1. Reference and background checks - Many employers request names, addresses and telephone numbers of...
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A bag contains 1 red and 3 white balls. Find the probability distribution of the number of red balls if 2 balls are drawn at random from the bag
Let X be the random variable defined as the number of red balls. Then X = 0, 1 P(X = 0) = \(\frac{3}{4}\times\frac{2}{3}=\frac{6}{12}=\frac{1}{2}\) P(X = 1) = \(\frac{1}{4}\times\frac{3}{3}+\frac{3}{4}\times\frac{1}{3}=\frac{6}{12}=\frac{1}{2}\) Probability Distribution Table: X 0 1 P(X) \(\frac{1}{2}\) \(\frac{1}{2}\)
2 Answers 1 views