Question

The movement of a projectile, thrown upwards vertically, is described by the equation y = - 40x + 200x . Where y is the height, in meters, reached by the projectile x seconds after launch. Therefore, determine the instant when the projectile hits the ground.

Answer 1

pen

Explanation:

Answer 2

The instant the projectile hits the ground is at 5 seconds.

Explanation:

Easiest and fastest way to do this is to graph the equation and analyze where the graph crosses the x-axis.