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qUESTIONS

11th-jee

A car, starting from rest, accelerates at the rate / through a distance S, then continues at constant speed for time t and then decelerates at the rate f/2 to come to rest. If the total distance traversed is 15 S then

11th-jee

A balloon rises from rest with a constant acceleration g/8.A stone is released from it when it has risen to height h. The time taken by the stone to reach the ground is

11th-jee

A parachutist after bailing out falls 50 m without friction. When parachute opens, it decelerates at 2 m/s² He reaches the ground with a speed of 3 m/s. At what height, did he bail out

11th-jee

Which of the following velocity-time graphs shows a realistic situation for a body in motion

11th-jee

An object is moving with a uniform acceleration which is parallel to its instantaneous direction of motion. The displacement (s)-velocity (v) graph of this object is

11th-jee

When a ball is thrown up vertically with velocity V0 it reaches a maximum height of ‘h’. If one wishes to triple the maximum height then the ball should be thrown with velocity

11th-jee

Two spheres of same size, one of mass 2 kg and another of mass 4 kg, are dropped simultaneously from the top of Qutab Minar (height=72 m). When they are 1 m above the ground, the two spheres have the same

11th-jee

Three different objects of masses m1,m2 and m3 are allowed to fall from rest and from the same point ‘O’ along three different frictionless paths. The speeds of the three objects, on reaching the ground, will be in the ratio of

11th-jee

From the top of a tower, a particle is thrown vertically downwards with a velocity of 10 m/s. The ratio of the distances, covered by it in the 3rd and 2nd seconds of the motion is (Take g = 10m/s²)

11th-jee

A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its flight if the air resistance is not ignored

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