117 2015 Hw#06 (Ch 09) Problem 9.30- Local Problem 9.30 Local Part B You want t

Question

117 2015 Hw#06 (Ch 09) Problem 9.30- Local Problem 9.30 Local Part B You want t appropriat related to One week in lab, you're given a spring-loaded bar that can be used to strike a metal ball. Your assignment is to measure what size impulse the bar delivers to the ball. You and your lab partner decide to place several balls of different mass on the edge of the lab table, use the striker to launch them horizontally, and measure the horizontal distance to where each ball hits the floor. After measuring the table height to be 1.5 m, you and your partner acquire the following data Sort all va Horiz Mass, m (±0.1g) 100.0 150.0 200.0 250.0 Range, R (±0.1cm) 247.0 175.0 129.0 98.0 Incorrect You sorted 4 d

Explanation / Answer

Using the equation of motion,

s = ut + 0.5*at^2

In vertical motion.

u = initial vertical speed = 0

So, s = 1.5 = 0.5*g*t^2

So, t = sqrt(2*1.5/9.8) = 0.553 s

So, Impulse = 0.245/0.553 = 0.443 kg.m/s <--------answer

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