Recent content by PhySci83

Are the forces that act on m1 the force of system accelerating from the force acted upon it plus the force of the spring? So a FBD would look like: | | FN --->Fs [__m1__] -------> a | | Fg F,x,m1= (m1*a) + Fs F,x,m2=(m1+m2)*a -Fs Then doesn't Fs cancel out? acceleration of m1 is...

Whoops! What I meant was: Fnet,m1,x= (m1 + m2)*a Fnet,m1,y= 0 Fnet,m2,x= (m1+m2)*a - Fs Fnet,m2,y= 0 Then F_net = Fnet,m2,x + Fnet,m1,x

OK, so I think I have the FBDs, but this was the part I was struggling the most with. So for m1 I have: | | FN [__m1__] -------> a | | Fg Fnet,m1,x= a Fnet,m1,y= 0 Am I missing the force of the spring on this? Isn't there an added force in the positive...

Homework Statement A 2.0-kg mass (m1) and a 3.0-kg mass (m2) are on a horizontal, frictionless surface, connected by a massless spring with spring constant k = 140 N/m. A 15-N force (F) is app0lied to the larger mass, m2, as shown in the figure: |__m1__|-/-/-/-/-|____m2____| ----------> F...

Thanks for your help!

Homework Statement Prove that normal force between a block and wedge is: N = m*sqrt(g^2-a^2) Homework Equations I used the pythagorean theorem to attempt this. The Attempt at a Solution See attached. Am I doing this right, or am I making up math here to fit the answer?

Homework Statement To find the height of an overhead power line, you throw a ball straight upward. The ball passes the line on the way up after 0.80 s, and passes it again on the way down 1.6 s after it was tossed. What is the height of the power line and the initial speed of the ball...