A thief jumps from the roof of a house with a box of weight on his head. What will be the. weight of the box as experienced by the thief during jump?

A body age of mass 50 kilogram, what is his weight?

A spring balance is graduated from O to 16 kg. When is reads 16 kg the spring is stretched by 10 cm. A body suspended from the spring is found to oscillate vertically with a frequency 2 oscillations per second. What the weight of the body ?

A trolley of mass 200 kg moves with a uniform speed of 36 km/ h on a frictionless track. A child of mass 20 kg runs on the trolley from one end to the other (10 m away) with a speed of 4 m s^-1 relative to the trolley in a direction opposite to the its motion, and jumps out of the trolley. What is the final speed of the trolley? How much has the trolley moved from the time the child begins to run?

A ball dropped from a height og h.If the co-efficient of restitution be e , to what height will it rise after jumping twice from the ground.

A box contains 12 balIs out of which x are black.If one ball is drawn at random from the box,what is the probability that it will be a black ball? If 6 more black balls are put the box,the probability of drawing a black ball is now double of what it was before. find x.

cards marked with numbers 1, 2,3,.....,25 are placed in a box and mixed thoroughly and card is drawn at random from the box what is the probability that the number of the card is a prime number

Numbers 1 to 10 are written on ten separate slips (one number on one slip) kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of. getting a number less than 6?

Numbers 1 to 10 are written on ten separate slips (one number on one slip) kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of. getting a number greater than 6?

A box contains 3 blue, 2 white and 4 red balls. If A ball is drawn from the box what is the probability that the ball is not white.