Question

Onur drops a basketball from a height of 10 m on Mars, where the acceleration due to gravity has a magnitude of 3.7 . We want to know how many seconds the basketball is in the air before it hits the ground. We can ignore air resistance. Which kinematic formula would be most useful to solve for the target unknown? Choose 1 answer: 2

Answer 1

DATA: - (DX) = (10 m) (a) = (3.7 m/s^2) (v_0) = (0) [because STARTS FROM REST] (t) = ? - Here, only initial velocity ��v_0��, displacement ��ox�� acceleration ��a�� are given in order to calculate time taken for basket ball to be in air before hitting ground. Hence, instead of using any other formulae, we can use, (delta x) = [V_0 t + 1/2 a t^2] rightarrow (1) [where (t) = (time taken) (a) = (acceleration) (V_0) = (initial velocity) (delta x) = (displacement)] \r\n Here, ball is dropped in the direction of gravity only. Hence, (a) = (+ a) therefore (i) rightdoublearrow (delta x) = [V_0 t + 1/2 at^2] Hence, (A) is correct choice.