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Felipe is riding his skateboard toward Lilah at 15 km/h. He throws a football to Lilah. The football is thrown at 8 km/h. How fast is the football traveling when it reaches Lilah?
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5 votes
Felipe is riding his skateboard toward Lilah at 15 km/h. He throws a football to Lilah. The football is thrown at 8 km/h. How fast is the football traveling when it reaches Lilah?

User Mlp
by
6.4k points

2 Answers

7 votes

Answer:

23 km/h

Step-by-step explanation:

Felipe is riding his skateboard toward Lilah at 15 km/h. He throws a football to Lilah-example-1
User Hoang Subin
by
5.6k points
3 votes
Felipe is moving towards Lilah at velocity

v_f = +15 km/h
and the velocity of the football with respect to Felipe is

v_b=+8 km/h
Therefore, the velocity of the football relative to Lilah is the sum of the two velocities:

v=v_f+v_b=15 km/h+8km/h = 23 km/h
User JakeSays
by
4.7k points
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