NO HAND WRITTEN ANSWERS PLEASE Question #2 BOOK: physics concepts and connection

Question

NO HAND WRITTEN ANSWERS PLEASE Question #2 BOOK: physics concepts and connections 5th 0.3 Pre-Lab 3: Observations of Motion Name Section Date Reading: Hobson Ch.3: section 3.4 & section 3.5 Galileo found that gravity causes constant acceleration along an incline. Assuming an object starts from rest ·The relationship between distance (s), acceleration (a), and time (t) is s at, where refers to the fact that the distance measurement measures the difference between its position at the beginning and end of the experiment ·The relationship between speed, acceleration and time is: u = at . Keep in mind that A (A squared) is A multiplied by A, not A multiplied by 2 Question #:1 .A cart on a linear track has a uniform acceleration of 0.172m/s2. What is the velocity of the cart 4.00 s after it is released from rest? How far does this cart travel during these 4 s? From the first equation, give the expression of the acceleleration a In table 1 is a data set of time and distance traveled. Question #:2 Complete table 1 find the average acceleration

Explanation / Answer

1. given a = 0.172 m/s/s

t = 4 s

hence

v = u + at

v = 0 + 0.172*4 = 0.688 m/s

s = (v^2 - u^2)/2a = 0.688^2/a = 2.752 m

a = (v - u)/t = 0.172 m/s/s

2. the following is the complete table

0 0 0 0

0.25 0.45 0.2025 2.469135802

0.5 0.71 0.5041 1.983733386

0.75 0.77 0.5929 2.529937595

1 0.98 0.9604 2.082465639

1.25 1.07 1.1449 2.183596821

1.5 1.12 1.2544 2.391581633

aavg = 2.2734 m/s/s

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