Year: 2009
Newton’s 3rd Law of Motion
Sample HW Sol’n. Section 4.3 #70
Frictionless Dynamics WS #6 Sol’n
A 25kg box is pulled across the floor by means of a rope attached at a 35° angle to the horizontal. If the applied force to the rope is 50N, what is the acceleration of the box?
Physics Cat
Submitted by one of our physics students. Not sure I agree with it, but you have to admit, it is funny…
Sample Homework Problem Sol’n, 4.2 #25
Newton’s 2nd Law Continued: Elevators, Scales and Ramps
Scales don’t actually read your weight, they read the normal force the scale exerts on you. Therefore, if you want to know what a scale reads, solve for the normal force using Newton’s 2nd Law!
