In a circus, the diameter of globe of death is 20m, From what minimum height must a cyclist start in order to go round the globe successfully

A lift in a mine moves down 24m in 8 mins. If its moves in an uniform rate, let's find at what distance below the surface, it will be after 6 mins. If the lift starts from a height 10 m above the ground, let's find how deep the lift will go from the surface after 70 mins.

In Young' s double slit experiment, two monochromatic light of wavelengths 650 nm and 520 nm are used to form an interference pattern . Seprsation between the two slits is 2xx 10^(-3) m and screen is 1.20 m away from the slits. At what minimum distance apart from the central maxima, bright fringes due to both the waves will be overlapped?

A cyclist starts from place A and covers a distance of 2400 m to reach the place B. If the maximum possible acceleration of the cyclist is 2m//sec^2 and its maximum retardation is 4 m//sec^2 , what ts the least time the cyclist can undertake the journey from A to B ?

Puja and Mohammad started a competition of race from the same time and same point of a circular track of diameter 56 m. When Puja finished the race by rounding 10 times the track, Mohammad then remained one round behind Puja. How many of metres was race and by what meters Puja defeated Mohammad ?