Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m Give the magnitude and direction of:- the force on the 7th coin by the eighth coin,

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m Give the magnitude and direction of:- the reaction of the 6th coin on the 7th coin.

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m Give the magnitude and direction of:- the force on the 7th coin (counted from the bottom) due to all the coins on its top,

Two forces of 6 N and 8 N act at a point at an angle 90^@ with each other.Find the magnitude and direction fo the resultant force.

A helicopter of mass 1000 kg rises with a vertical acceleration of 15 m s^-2 . The crew and the passengers weigh 300 kg. Give the magnitude and direction of the:- force on the floor by the crew and passengers,

In a purse there are 10 coins, all shillings except one, which is a sovereign in another purse, there are 10 coins, all shilings. Nine coins are taken from the former purse and put into the latter, and then nine coins are taken from the latter and put into the former. find the chance that the sovereign is still in the first purse.

Find the probability of drawing one rupee coin from a purse with two compartments one of which contains 3 fifty paise coins and 2 one rupee coins and the other contains 2 fifty paise coins and 3 one rupee coins.

A game consists of tossing a one rupee coin 3 times and noting its out come each time. Hanif wins if all the tosses give the same result i.e. Three heads or three tails, and loses otherwise. Calculate the probability that Hanif will lose the game.

Two long straight conducors are placed parallel at a distance of 2 cm form each other. When one of them caries a current of 60 A, the force on 1 m length of the other is 1,200 dyne. Calculate current in the other.