The ratio of angular speed of a second-hand to the hour- hand of a watch is
B.
We know that, angular speed of a watch
Which of the points is likely position of the centre of mass of the system shown in the figure ?
A
D
B
C
Two balls are thrown simultaneously in air. The acceleration of the centre of mass of the two balls when in air
is equal to g (acceleration due to gravity)
depends on the speeds of the two balls
depends on the masses of the two balls
depends on the direction of motion of the two balls