Question

Two balls are projected simultaneously with the
same velocity 'u' from the top of a tower, one
vertically upwards and the other vertically
downwards. Their respective times of the
journeys are t, and t2. At the time of reaching
the ground, the ratio of their final velocities is

​

Answer 1

Answer:

1 : 1

Step-by-step explanation:

Two balls are projected simultaneously with the same velocity 'u' from the top of a tower, one vertically upwards and the other vertically downwards. Their respective times of the journeys are t, and t2.

At the time of reaching

the ground, the ratio of their final velocities is 1: 1

as ball thrown upward will come back at the same point with same magnitude of velocity but with downward direction.

this velocity would be same as of ball thrown down wards.

so both balls have same velocity and will move with same acceleration , hence both balls will reach with same velocity at ground.

Answer 2

Answer:

S=ut-1/2gt2

S1=0, S2=0

U1=0, u2=0

t=t, t=t2  

g= +9.8, g= -9.8

so after putting values in the equation

we will get ratio of 1:1 in their final velocities.