Which one is in the air for a longer time?

Source: 200 Puzzling problems [1]

8 Answers

3
msp ·

ball B covers the greater distance (parabola)

for ball A T=2Ï€/4√1/g

for ball B T=√2/g

62
Lokesh Verma ·

Hint/ confusion/ Question: what about collision between the balls?

3
msp ·

collision is elastic and the balls are identical,so velocities gets interchanged.

1
Arshad ~Died~ ·

the vertical acceleration of B will always be g
so i am getting its time as 1/2 sec approx....

1
decoder ·

i think ball A should be in motion for a greater time as the thread exerts a upward force on it which should reduce it's verical accelaration(<g) and thus it will take longer time

1
decoder ·

and since it is an elastic collision and the balls have same mass the velocities will interchange and ball B distance=2m

and pendulum will cover a quater of circle i.e 2Ï€(1)/4 =1.73

therefore B will cover a longer path

24
eureka123 ·

A is in motion for longer time..due to tension force present which retards it a bit

and B travels a larger distance

24
eureka123 ·

oops decoder did the same thing....sorry for repeating [2]

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