Physics

Problem

Projectile A is launched from ground level at an angle of

40^\circ

and lands

120\,\text{m}

away on level ground. Projectile B is to be launched from the same point at an angle of

50^\circ

so that it also lands

120\,\text{m}

away. (Take

g = 9.8\,\text{m\,s}^{-2}

.) a. (i) Determine the initial speed of projectile A. b. (ii) Calculate the initial speed required for projectile B.