Lab 4: Combining Forces
The purpose of this lab is to look at what happens when multiple forces act on an object and how
they affect the motion of that object.
Force sensor, cart and track with pulley, fan
Activity 1: One
Lab 2 Uncertainty!
The purpose of this lab is to introduce the concept of uncertainty in physical measurements.!
Every measurement has an amount of uncertainty associated with it. The uncertainty can tell us
the likely value of a repeated m
Lab 4 Atwoods Machine!
The purpose of this lab is to measure the acceleration due to
gravity using the Atwoods machine. The Atwoods machine is
a gravity driven device so the acceleration due to gravity
appears in its description.!
Lab 1 Vectors!
The purpose of this lab is to practice applying the concept of vectors to physical situations.!
We are going to balance several forces and test to see if the total force is zero by mapping the
forces as vectors in order to ca
Lab 3 Acceleration!
The purpose of this lab is to measure the accelerations of an object as it undergoes complex
motion. We will also attempt to see if apparent free-fall motion actually has an acceleration of
9.807 m/s2. We will use a moti
Lab 5 Newtons Second Law
The purpose of this lab is to explore the precise relationships in Newtons second law of motion.
Cart, track, pulley and weights with motion sensor and force sensor
For all of the mea
Lab 1 Post Lab
1. What do you do in front of the motion sensor to produce a
horizontal line for the position-time graph?
Answer. You remain stationary.
Answer. You move away from the origin at a constant rat
Homework 14 (due monday 12/8/14)
The practice problems are here for you to familiarize yourself with the denitions.
Practice Problems Chapter 10
12, 13, 16, 17, 32, 47, 51, 55, 57, 61, 72
Practice Problem Chapter 11
4, 10, 11, 13, 23, 26, 29, 48
A 500 g cart is pulled by a 100 g hanging mass that is
to be stopped by a spring. The process is split into
three states. At state a, the objects are released
from rest. At state b, the cart makes initial contact
with the sprin
Homework 13 Solution
Practice Problems Chapter 9
5, 6, 13, 14, 15, 17, 22, 25, 32, 32, 34, 37, 39, 42, 70, 71, 80
You throw a 200 g rubber ball down from a height of 2 meters at a speed of 4 m/s. The ball
bounces off of the ground and tra
Homework 9 (due Monday 11/3/14)
Practice Problem Chapter 6
21, 22, 25, 26, 28
52, 55, 56, 58, 59, 61, 62, 63, 64
76, 85, 95, 100, 105, 107
A 1,500 kg car needs to go around a banked and frictionless, circular track whose radius is 16
Homework 11 Solution
A 50 kg skateboarder is released from rest at the top of a frictionless ramp 8 meters above the
a. How many forces act on him on his way down?
b. How much work is done by each of the above force when
Homework 7 (Due Wednesday 10/22/14)
You are standing in a train that has a rough interior oor. You are holding a rope that is attached
to the ceiling of the train. The train is traveling at some constant velocity when it brakes. When
Exam 1 Solution
An object travels with a velocity that changes from +10 m/s to 10 m/s linearly in 5 seconds. The
graph of that motion looks like this.
a. Plot the acceleration graph and the position graph with the object st
Homework 5 Solution!
A cannon res a cannonball at a speed of 30 m/s at an angle of 55 above the horizon. By speed
I mean the magnitude of the velocity.!
a.! At what time(s) after ring does the cannonball have a speed of 20 m/s?!
Homework 3 Solution!
A sprinter starts at rest from the starting line and runs a 100 m dash in 10.0 seconds. We are
going to model this in two different ways.!
One Acceleration Model!
The sprinter starts with a constant acceleration
Exam 2 Solution
You slide a glass of water whose total weight is 20 newtons down a rough counter. The coefcient
of kinetic friction between the glass and the counter is 0.4. You push the glass from rest for 0.5
second with a constant sideway fo
Exam 3 Solution
A 1 kg block is launched using a 500 N/m spring on
a frictionless surface. It slides off of a 1.5 meter high
edge and lands 3 meters from the edge.
a. How much kinetic energy does the block have at
b. How fa