Oh! I see it now.
In the y-direction: Fn + Fty - Fg = 0
Fn = Fg - Fty = mg - mgsinθ
Fn = 50 (not 150)
So:
Ff = 50 * 0.4
Ff = 20 N
W = Frcosθ = 20*10*cos180 = -200 J
Yay thanks so much for your help! I really appreciate it :)
I don't understand exactly... The vertical force of the rope is pulling it upwards, combined with Ftx to pull it at an angle. But it doesn't do any work on the crate, correct? Because the crate is not moving vertically, only horizontally. That's why I only paid attention to the forces acting in...
I'm using a review book to study for physics but I don't understand how this answer was obtained. I got a different answer. When I googled the exact same question, I found a website that got the same answer as me... so is the book wrong? The question is as follows:
1. Homework Statement
A 15...
Homework Statement
Find Particle A's speed with respect to Particle B.
I am given:
Particle A: (15i - 10j) or 18.03 m/s
angle A: -33.69 degrees
Particle B: (5i + 15j) or 15.81 m/s
angle B: 71.57 degrees
(Both angles with respect to x axis)
Homework Equations
Had there not been any angles, I...
Very simple question but I am confused... I am asked to find Particle A's speed with respect to Particle B. What does this mean?
I am given:
Particle A: (15i - 10j) or 18.03 m/s
Particle B: (5i + 15j) or 15.81 m/s
I just don't understand what I'm being asked to find and how to go about solving...