## Question

###### At a given instant the football player at $A$ throws a football $C$ with a velocity of $20 \mathrm{m} / \mathrm{s}$ in the direction shown. Determine the constant speed at which the player at $B$ must run so that he can catch the football at the same elevation at which it was thrown. Also calculate the relative velocity and relative acceleration of the football with respect to $B$ at the instant the catch is made. Player $B$ is $15 \mathrm{m}$ away from $A$ when $A$ starts to throw the football.

At a given instant the football player at $A$ throws a football $C$ with a velocity of $20 \mathrm{m} / \mathrm{s}$ in the direction shown. Determine the constant speed at which the player at $B$ must run so that he can catch the football at the same elevation at which it was thrown. Also calculate the relative velocity and relative acceleration of the football with respect to $B$ at the instant the catch is made. Player $B$ is $15 \mathrm{m}$ away from $A$ when $A$ starts to throw the football.

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