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While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the speed of the tennis ball is km/h.

While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the speed of the tennis ball is km/h.
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While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the speed of the tennis ball is km/h.

User Coblr
by
8.3k points

2 Answers

0 votes
8 km/h I think good luck if it's wrong
User Antonietta
by
8.4k points
2 votes

the answer is 11 km/h ... i just took the test

User FerDensetsu
by
8.9k points
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