What is wheel and axle?

Give example of a wheel and axle?

How the direction of rotation of Barlow's wheel can be changed?

The perimeter of a front sheel and rear wheel of an engine are 14 dcm. and 35 dcm respectively. Let’ find the minimum distance the engine can cover before both wheels take complete revolutions together

The number lock of a suitcase has 4 wheels each labeled with ten digits from 0 to 9 the lock open with a sequence of four digits with no repeats what is the probability of a person getting the right sequence to open the suitcase?

The number lock of a suitcae has 4 wheels, each labelled with ten digits i.e., from 0 to 9. The lock opens with a sequence of four digits with no repeats. What is the probability of a person getting the right sequence to open the suitcase?

A wheel of radius 8 units rolls along the diameter of a semicircle of radius 25 units; it bumps into this semicircle. What is the length of the portion of the diameter that cannot be touched by the wheel? (a)12 (b) 15 (c) 17 (d) 20

On which factors does the speed of rotation of a Barlow's wheel depend ?