xavier is roller skating at 14 km/h and tosses a set of keys forward on the ground at 8 km/h. the speed of…
xavier is roller skating at 14 km/h and tosses a set of keys forward on the ground at 8 km/h. the speed of the keys relative to the ground is km/h.
Answer
Explanation:
Step1: Identify velocities
Xavier's speed $v_x = 14$ km/h and the speed of keys relative to Xavier $v_{k - x}=8$ km/h.
Step2: Calculate relative - speed
The speed of keys relative to the ground $v_k$ is the sum of Xavier's speed and the speed of keys relative to Xavier. So $v_k=v_x + v_{k - x}$. $v_k=14 + 8$
Answer:
22