Question

A sack of potatoes weighing 13.1-kg falls from a very tall building. At a certain point at the motion downwards, its measured acceleration is 3.7 m/s2 and its velocity is 70.4 m/s. Assuming that the magnitude of the drag force due to air resistance is proportional to the square of its speed, What is its terminal speed?

Select one: a. 89.20 m/s b. 70.40 m/s c. 10.63 m/s d. The sack keeps accelerating until it reaches the bottom

Answer 1

Using the concept of Newton's law , we can find the value of k ( constant in drag force ) and after that using concept of terminal velocity , where net force acting on particle is zero.