Class XI A stone of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of 40 rev./min in a horizontal plane. What is the tension in the string? 6.6 N 6.1 N 6.9 N 6.3 N A stone of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of 40 rev./min in a horizontal plane. What is the maximum speed with which the stone can be whirled around if the string can withstand a maximum tension of 200 N? 35 m s−1 37 m s−1s−1 H 33 m s−1 33 m s A man of mass 70 kg stands on a weighing scale in a lift which is moving upwards with a uniform speed of 10 m s−1s−1, what would be the reading on the scale? 75 kg 35 kg 70 kg 105 kg A man of mass 70 kg stands on a weighing scale in a lift which is freely falling under gravity. What would be the reading on the scale? 125 kg 0 kg 95 kg Hz 115 kg A man of mass 70 kg stands on a weighing scale in a lift which is moving downwards with a uniform acceleration of 5 m s−2s−2 what would be the reading on the scale? 45 Kg 35 kg 53 kg 35 kg Do you really want to submit this quiz? Cancel Submit Quiz