Lab 11 Dynamics Lab Report

Grade 11 Dynamics
Lab Report

Friction

SPH3U1-02 Williams. C.

By----James & Hao Feng & Henry Zhang

Purpose:
By measuring the friction and μ of a container and change different variables including mass, surface and gradient, get causes of the change of friction and μ.

Materials:
A container
Three Pen bag in different mass
A rough wood board
A clean desk
Rulers
Thrust meter.

Steps
Prepare the materials that we gonna use. (Thrust meter; Pen bag; container; a board, ruler)
Measure the mass and the Gravity of the stuffs that we are going to use. (Pen bag and container)
Make sure the degree of the included angle between the table and
The coefficient is typically less than the coefficient of static friction, reflecting the common experience that it is easier to keep something in motion across a horizontal surface than to start it in motion from rest.

m1=container

m1=380g m2=170g m3=300g m4=100g

M(g)
Fg(N)
Ffk(N) μk Ff m1 380
3.724
0.8
0.215
0.8 m1+m2 550
5.39
1.1
0.204
1.1 m1+m2+m3+m4 950
9.31
2
0.215
2

Change surface and do the steps above again:

M(g)
Fg(N)
Ffk(N) μk Ff m1 380
3.724
1.1
0.295
1.1 m1+m2 550
5.39
1.7
0.315
1.7 m1+m2+m3+m4 950
9.31
3.2
0.332
3.2

Determine the frictions on a