Two bodies of different masses are dropped from heightsof 16 m and 25 m respectively. The ratio of the timetaken by them to reach the ground is
A particle moving with a uniform acceleration travels 24m and 64 m in the first two consecutive interval of 4 seach. Its initial velocity will be
A ball is released from the top of a tower of height hmetre. It takes T sec to reach the ground. Whatt is theposition of the ball in T/3s?
An automobile travelling with a speed of 60 kmh-1, canbrake to stop within a distance of 20 m. If the car isgoing twice as fast, ie., 120 kmh-1, the stopping distancewill be
A boat travels 50 km east, then 120 km north and finallyit comes back to the starting point through the shortestdistance. The total time to journey is 3 h. What is theaverage speed, in kmh-1, over the entire trip?
A body is thrown vertically upwards with velocity u. Thedistance travelled by it in the fifth and the sixth secondsare equal. The velocity u is given by (g = 9.8 ms-2)
An object accelerates from rest to a velocity 27.5 ms-1in 10 s, then the distance covered after next 10 s is
A body moving with uiform acceleration, describes 40 m in the first 5 s and 65 m in next 5 s. Its initialvelocity will be
A particle starts from rest and experiences constant acceleration for 6 s. If it travels a distance d1 in the first two second, a distance d2 in the next two seconds anda distance d3 in the last two second, then
A body moves for a total of nine second started fromrest with uniform acceleration and then with uniformretardation which is twice the value of acceleration andthen stops. The duration of uniform acceleration
A ball is thrown vertically upwards with an initial velocity1.4 ms-1 returns in 2 s. The total displacement of theball will be
The distance covered by a freely falling particle startingfrom rest in the first, second, third, ..........,nth secondof its motion.
Two balls of different masses are throuwn verticallyupwards with the same speed. They pass through thepoint of projection in their downward motion (neglectingair resistance)
A stone is dropped into a well in which the level of wateris h below the top of well. If v is the speed of sound, thetime T after which the splash is heard is given by
A particle experiences constant acceleration for 20second after starting from rest. It travels a distance s1in first 10 seconds and a distance s2 in next 10seconds, then
A boy is throwing balls into the air, throwing onewhenever the previous one is at its highest point.How high do the balls rise if he throws twice a second?
An elevator in which a man is standing, is movingupwards with a speed of 10 m/s. If the man drops acoin from a height of 2.45 m, it reaches the floor of theelevator after a time :(g = 9.8 m/s2)
The initial velocity of a particle moving along a straightline is 10 m/s and its retardation is 2 m/s2. The distancemoved by the particle in the fifth second of its motion is
A ballon is going upwards with velocity 12 m/s. It releasea packet when it is at a height of 65 m from the ground.How much time will the packet take to reach the groundif g = 10 m/s2?
When two bodies move uniformly towards each otherthe distance between them decreases by 6 m/s. If bothbodies move in the same direction with the same speeds(as above), the distance between them increases by 4m/s. Then the speeds of the two bodies are :
A train of 150 m in length is going towards north directionat a speed of 10 m/s. A parrot flies at a speed of 5 m/stowards south direction parallel to the railway track.Then the time taken by the parrot to cross the train isequal to :
Water drops fall at regular interval from a tap which is5.0 m from the ground. The third drop is leaving the tapat the instant the first drop touches the ground. How farabove the ground is the second drop at that instant :
The engine of a motor cycle can produce a maximumacceleration of 5 m/s2 and its brakes can produce amaximum retardation of 10 m/s2.What is the minimum time in which it can cover adistance of 1.5 km :
A ball is thrown up, it reaches a maximum height andthen comes to rest. If t1 and t2 (t2>t1) are the times thatthe ball takes to be at a particular height, then the timetaken by the ball to reach the highest point is :
A particle is dropped vertically from rest from a height.The time taken by it to fall through successive distancesof 1 metre each will then be