Name PHYS 193 Spring 2016 Final Exam Write your answers (with appropriate precis

Question

Name PHYS 193 Spring 2016 Final Exam Write your answers (with appropriate precision) in the blanks provided. Indicate all units 9. Use the following results of the "Acceleration/Welocity" experiment to fill out the table below 1.6 1.4 1.2 0.8 e0.6 0.4 0.2 time (s) 0- -0.20 0.5 1.5 2 2.5 1.2 0.8 0.4 0.2 0 0.2 time (s) 0.5 1.5 2 2.5 3.5 Amount of weight hanging over the pulley? Tension in the cord while the cart is moving under the influence of the weight hanging over the pulley? When does the weight at the end of the pulley hit the floor? Between what times is the cart moving away the sonar? At what range of times is the cart closest to the sonar? Cart's acceleration when it is moving under the influence of the weight hanging over the pulley? Cart's velocity at 2.0 seconds? Cart's acceleration at 2.0 seconds? Mass of the cart?

Explanation / Answer

let weight hanging on the pulley be m, mass of cart be M

then ignoring moment ofinertia of the pulley

acceleration = a = (M - m)g/(M +m)

now,

a. when the cart is not moving

T = 1.5 N = mg

m = 0.152 kg

b. when cart is moving under the influence of gravity

T = 1.05 N

c. the weight at the end of the pulley hot the floor when T becomes 0, i.e at t = 2.35 s

d. between t = 2.5 to t = 3.5 s the cart is moving away form the sonar

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