Science:Math Exam Resources/Courses/MATH102/December 2019/Question 11/Statement

From UBC Wiki

A ball is thrown in the air so that initially it is travelling upwards(the positive direction) at 10m/sec. It accelerates under gravity and air resistance, so that its vertical velocity v(t) satisfies the differential equation

(here t is measured in seconds and v is measured in m/sec).

How many seconds will it take for the ball reach the peak of its arc?