Physics

Problem

A truck with a flatbed

2\,\text{m}

high is moving away from a launcher at a constant speed of

10\,\text{m/s}

. When the truck is

40\,\text{m}

away, a projectile is launched from the ground at an angle of

45^{\circ}

with speed

u

. Find

u

such that the projectile lands directly on the moving truck bed. (Take

g = 10\,\text{m/s}^{2}

)