A Ashlee New member Jun 17, 2009 #1 A 3.2 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 17.6 N. Find the speed of the block after it has moved 5 m. Answer in units of m/s.
A 3.2 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 17.6 N. Find the speed of the block after it has moved 5 m. Answer in units of m/s.
J Johnka New member Jun 17, 2009 #2 F = ma 17.6 = 3.2 a, a = 17.6/3.2 v^2 = u^2 + 2 as (Have you learned this equation?) v^2 = 0 + 2 * 17.6/3.2 * 5 = 176/3.2 = 55 V = sqrt 55 m /s
F = ma 17.6 = 3.2 a, a = 17.6/3.2 v^2 = u^2 + 2 as (Have you learned this equation?) v^2 = 0 + 2 * 17.6/3.2 * 5 = 176/3.2 = 55 V = sqrt 55 m /s
R Ryan James McCulloch New member Jun 17, 2009 #3 I'm going to say 5.5 m/s... but I can't be sure. Rearranging the equation makes me think it's force times mass but I think it's Force/Mass... A=F/M being the forumla I use.
I'm going to say 5.5 m/s... but I can't be sure. Rearranging the equation makes me think it's force times mass but I think it's Force/Mass... A=F/M being the forumla I use.
