Chapter_2__Student_Problems_Problems

# Chapter_2__Student_Problems_Problems - Problem 2-0 A...

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Problem 2-0 t = .414 s 18.4 m v =160 km/h t’ =.279 s d’ = 12.4 m 12.4 m d’ ≈ 36 ft A baseball pitcher throws a fastball at a horizontal speed of 160 km/h. Home plate is 18.4 m away? a) How long (in seconds) does it take the ball to reach home plate? b) If the batter’s reaction time is .135 s, how much time does the batter have to decide whether or not to swing at the pitch? Where is the ball at this time?

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Problem 2-3 0 10 20 30 40 50 60 70 80 0 0.5 1 1.5 2 2.5 t (h) x (km) Series1 v av = 40 km/h Δt 1 Δt 2 Δt An automobile travels on a straight road for 40 km at 30 km/h. It then continues in the same direction for another 40 km at 60 km/h. (a) What is the average velocity of the car during this 80 km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed? (c) Graph x vs. t and indicate how the average velocity is found on the graph.
Problem 2-61 d = 100 m 0 1 2 3 4 5 6 7 8 9 0 4 8 12 16 Time (s) Velocity (m/s) Series1 A 1 A 2 A 3 A 4 How far does a runner whose

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## This note was uploaded on 02/21/2009 for the course PHY 3425345 taught by Professor Dr.schrieber during the Spring '08 term at TCNJ.

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Chapter_2__Student_Problems_Problems - Problem 2-0 A...

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