2. A 50-kg box is being pushed along a horizontal surface. The coefficient of static friction between the box and the ground is 0.65, and the coefficient of kinetic friction is 0.35, What horizontal force must be exerted on the box for it to accelerate at 1.2 m/s2? A) 60 N B) 120 N C) 170 N D) 230 N E) 490 N Final formula: Required steps: 1) Draw free body diagram Add the forces acting on the box and label them 2) Choose reference frame 3) Find vectors components FN= ( FG = ( Add 2 more forces. No numerical values 4) Apply Newton's 2nd law
2. A 50-kg box is being pushed along a horizontal surface. The coefficient of static friction between the box and the ground is 0.65, and the coefficient of kinetic friction is 0.35, What horizontal force must be exerted on the box for it to accelerate at 1.2 m/s2? A) 60 N B) 120 N C) 170 N D) 230 N E) 490 N Final formula: Required steps: 1) Draw free body diagram Add the forces acting on the box and label them 2) Choose reference frame 3) Find vectors components FN= ( FG = ( Add 2 more forces. No numerical values 4) Apply Newton's 2nd law
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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No calc please follow required steps so I can understand better.
Transcribed Image Text:A 50-kg box is being pushed along a horizontal surface. The coefficient of static friction between the box
and the ground is 0.65, and the coefficient of kinetic friction is 0.35, What horizontal force must be exerted
on the box for it to accelerate at 1.2 m/s2?
A) 60 N
B) 120 N
C) 170 N
D) 230 N
E) 490 N
2.
Final formula:
Required steps:
1) Draw free body diagram
Add the forces acting on the
box and label them
2) Choose reference frame
3) Find vectors components
FN= (
FG = (
Add 2 more forces. No numerical
values
4) Apply Newton's 2nd law
Fnet = mä
Fnet-x =
Fnet-y =
You need to solve the above equation and find Fa= ???? without
substituting numerical values, but using only variables
5)
Find the horizontal F, algebraically
6) Check units
7) Substitute numerical values
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