Thread: please help me with this question.

A spaceship approaching touchdown on a distant planet has height h, in meters, at time t, in seconds, given by h=25t^2-100t+100. When does the spaceship land on the surface? With what speed does it land(assuming it descends vertically)?

Thanks

Originally Posted by Soul to soul

A spaceship approaching touchdown on a distant planet has height h, in meters, at time t, in seconds, given by h=25t^2-100t+100. When does the spaceship land on the surface? With what speed does it land(assuming it descends vertically)?

Thanks

When does the spaceship land on the surface?

set h = 0 and solve for t.

With what speed does it land(assuming it descends vertically)?



evaluate at the time that it lands.