please help 006 (part 1 of 3) 10.0 point:s You are traveling 81 km/h and you thr

Question

please help

006 (part 1 of 3) 10.0 point:s You are traveling 81 km/h and you throw a ball 48 km/h with respect to yourself. What is the ball's apparent speed to a friend standing by the road when the ball is thrown straight ahead? Answer in units of km/h 007 (part 2 of 3) 10.0 point:s What is the ball's apparent speed to the same friend when the ball is thrown sideways? Answer in units of km/h. 008 (part 3 of 3) 10.0 point:s What is the ball's apparent speed to the same friend when the ball is thrown backwards? Answer in units of km/h.

Explanation / Answer

part 1 of 3

The apparent speed is the sum of the velocities

v = 81 km/h + 48 km/h

v = 129 km/h

part 2 of 3

when ball is thrown sideways

v = sqrt (812 + 482)

v = 94.15 km/h

part 3 of 3

when ball is thrown backwards,

v = 81 - 48

v = 33 km/h

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