UP Board se bahut badi update

A flat horizontal board moves up and down under SHM vertically with amplitude A. The shortest permissible time period of the vibration such that an object placed on the board may not lose contact with the board is

A horizontal board is oscillating with an amplitude of 3 m. If the frequency of oscillation is 15 per minute, find the minimum value of coefficient of friction in order that a body placed on the board will A not slide when the board oscillates ?

On a particular day rain drops are falling vertically at a speed of 5 m/s. A man holdind a plastic board is running to escape from rain as shown. The lower end of board is at a height half that of man and the board makes 45^(@) with horizontal. The maximum speed of man so that his feet does not get wet, is

The ART technique that is also termed as a test - tube bady programme:

Important Essay Topics || UP Board Exam 2022 || Target Full Marks

Rennae needs to purchase at least 20 boards for group art project. The poster boards come in the small size, which costs $30 per board, and the larger size., which costs $50 per board. Her allowance for purchasing poster boards is no more than $860 in total. She must purchase at least 5 small poster boards and 4 larger poster boards.If a represents the number small poster boards and b represents the number of large poster boards, which of the following system of inequalities represents the restrictions described?

A chess board contains 64 equal squares and the area of each square is 6. 25\ c m^2 . A border round the board is 2 cm wide. Find the length of the side of the chess board.

A chess board contains 64 equal squares and the area of each square is 6. 25\ c m^2 . A border round the board is 2 cm wide. Find the length of the side of the chess board.

The coefficient of friction between the board and the floor shown in figure is mu . Find the maximum force that the man can exert on the rope so that the board does not slip on the floor.

A rough vertical board has an acceleration a so that a 2 kg block pressing against it dows not fall. The coefficient of friction between the block and the board should be