Question

a 2 kg plate kept sudpended in air by allowing 10 marbles hitting per sec with a speed v from the downward direction.if the mass of each marbles is 20 g then determine v​

Answer 1

The mass of plate is M = 100 g = 0.1 kg

ANSWER:-

The mass of bullet is m = 5 g = 0.005 kg

The bullets are fired at a rate of 10 bullets per second.

Let v be the speed of each bullet.

After colliding with the plate, they rebound with same speed.

Thus, rate of change in momentum of the bullets, that is, the force exerted by bullets is

2 v × 0.005 × 10

This balances the weight of the plate.

2 v × 0.005 × 10 = 0.1 × 9.8

v = 9.8 m/s

Answer 2

Answer:

Andaman Nicobar

The Andaman and Nicobar Islands, one of the seven union territories of India comprising 572 islands of which 37 are inhabited, are a group of islands at the juncture of the Bay of Bengal and Andaman Sea.

The territory is about 150 km (93 mi) north of Aceh in Indonesia and separated from Thailand and Myanmar by the Andaman Sea. It comprises two island groups, the Andaman Islands (partly) and the Nicobar Islands, separated by the 150 km wide Ten Degree Channel (on the 10°N parallel), with the Andamans to the north of this latitude, and the Nicobars to the south (or by 179 km). The Andaman Sea lies to the east and the Bay of Bengal to the west.

The territory's capital is the city of Port Blair. The total land area of these islands is approximately 8,249 km2 (3,185 sq mi). The islands host the Andaman and Nicobar Command, the only tri-service geographical command of the Indian Armed Forces. The territory is dived into three districts: Nicobar District with Car Nicobar as capital, South Andaman district with Port Blair as capital and North and Middle Andaman district with Mayabunder as capital.

The Andaman Islands are home to the Sentinelese people, an uncontacted people. The Sentinelese are the only people currently known to not have reached further than a Paleolithic level of technology.

I hope this will be help you.