Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
The fundamental aspects of these Lecture Slides are : Gravity, Quantum Chromodynamics, Fundamental Forces, Nature, Quantum Gravity, Binds Large, Universe, Large Scales, Builds Elements, Powers Stars
Typology: Slides
1 / 8
This page cannot be seen from the preview
Don't miss anything!
Life! Contact forces! Normal forces! Friction! Fundamental Forces of Nature binds large objects together (but makes the universe fly apart on large scales!) binds atomic nuclei together, builds elements, powers stars quantum chromodynamics quantum electrodynamics quantum gravity? Nuclear fission, drives supernova explosions Sources: Undetermined
On a horizontal, frictionless surface, the blocks above are being acted upon by two opposing horizontal forces, as shown. What is the magnitude of the net force acting on the 3kg block? A. zero B. 2N C. 1.5 N D. 1N E. More information is needed.
In a tug-of-war, team L pulls on team R with as large a force as it can. Likewise, team R pulls on team L. Eventually, team L prevails, as both teams shift to the left, and team L is declared the winner. Which statement describing this situation is correct?
Some tips for solving Newton’s second law problems:
1. Think! Define the system (or set of systems). - draw a cartoon and define your coordinate system(s). - identify all the forces that are acting 2. FBD. Draw a free-body diagram(s) for the system(s). - imagine a bubble enclosing the system - “shrink it to a dot” - draw vector forces in the chosen coordinate system. - apply Newton’s 3 rd law, if needed, at interfaces. 3. NSL. Apply Σ F = m a - in static situations, Σ F = 0. - in dynamic situations involving multiple objects, find the links between the objects (e.g., same acceleration)
Two identical masses are attached to either end of a very light rope draped across the very light pulley as shown. If angle A is a right angle, then the magnitude of the acceleration of the blocks expressed in terms of the tilt angle θ is A. 2 g cos θ B. g/2 sin θ C. 2 g (cos θ – sin θ) D. g/2 (sin θ + cos θ) E. g/2 (cos θ – sin θ)
Taking the + i direction to the right, what is the contact force that block B exerts on block A? A. zero B. –1.5 i C. –4.5 i D. 1.5 i E. 4.5 i F. –6.0 i
