PHY 101-First test October 12, 2017 EQUATIONS: p= nv, 1. A hockey puck is slidin
ID: 1783475 • Letter: P
Question
PHY 101-First test October 12, 2017 EQUATIONS: p= nv, 1. A hockey puck is sliding along the ice (with no friction or air resistance) at 5.0 m/s in the positive x dircction. It hits the side boards, briefly compresses and then springs back, and afterwards is sliding at 3.0 m/s in the negative x direction. (a) 13 pts.] When (if ever) is the puck's acceleration zero? (b) [3 pts.J When (if ever) docs the puck's acceleration have a positive x-component? (c) [3 pts.] When (if ever) does the puck's acceleration have a negative x-component? (d) [3 pts.] What is the direction of the puck's accelcration while the puck is slowing down? (e) [3 pts.] What is the direction of the puck's acceleration while the puck is speeding up? (f) [5 pts.) During the collision with the board, what is the change in the puck's velocity? Please give both the x-component and the magnitude and direction.Explanation / Answer
a) puck's acceleration is never zero
b) Never.
c) puck's acceleration is always in the negative x direction during the contact with the side boards;
d) negative x
e) negative x
f) ( -3 - 5 ) i m/s = -8 i m/s
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