Question

Two particles start from a point, simultaneously on a circle of radius 4 m in horizontal plane with speeds 4 m/s and 6 m/s respectively in opposite directions. The particle will collide each other after a time

Answer 1

Answer:

circumference of circle=2πr=8π

Let the distance traveled by them be d and D respectively. So we know that

d+D=10π.−−−−−−1

Let the time between start and collision be t. Then we know that

d=4t and D=6t

substituting into the first equation

10t=8π

t=

10

8π

t=

10

25.12

t=2.5sec