Q: A solid sphere falls with a terminal velocity of 20 ms-1 in air. If it is allowed to fall in vacuum.
(a) terminal velocity will be 20 ms-1
(b) terminal velocity will be less than 20 ms-1
(c) terminal velocity will be greater than 20 ms-1
(d) no terminal velocity will be attained
Ans: (d)
Sol:
Because there is no resistive force