Unit 01 Forces and the Laws of Motion Problem Set 01 Part One: Concepts 1. Define: Force‚ Net Force 2. What are the three ways a net force an affect the motion of an object? 3. What is the SI unit of force? What are the fundamental units of force? 4. Why is force a vector? 5. A chair is pushed forward with a force of 185N. The gravitational force of Earth on the chair is 155N downward‚ and the floor exerts a force of 155N upward on the chair. Draw a free-body diagram showing the forces
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Newton’s second law of physics dictates that acceleration is produced when a force acts on a mass. The greater the mass of the object‚ the greater the force needed to put the object in an accelerated motion. This relationship can be viewed in the formula: Force = mass (acceleration) The key to keeping the mousetrap car accelerating is to keep the forces acting upon it unbalanced. The force of the mousetrap car has to be larger than the force of friction working against the car. Because the force
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Uniformly Accelerated Motion Lab Report Introduction: The purpose of the Uniformly Accelerated Motion lab was to test Newton’s theory of gravitation‚ predicting that objects near the earth’s surface will experience constant acceleration. In this experiment‚ a glider was placed on an inclined air track and was then allowed to accelerate down the track under the force of gravity. With the aid of two photogates and an electronic timer‚ the times it took the glider to take the glider to pass through
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for the acceleration of a cart on a level track when it is attached by a string to a hanging mass at the end of the track. With the value of acceleration and the mass of the weight divided by the mass of the weight plus the mass of the cart‚ a value for free fall acceleration (g) could be determined. For the second part of the experiment‚ the objective was to derive a second equation for the value of constant air friction force using the known values of acceleration‚ free fall acceleration (g)‚ and
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EXPERIMENT II: SEPERATION OF A MIXTURE OF SOLIDS PURPOSE: The purpose of this experiment was for me to become familiar with the separation of mixtures and solids and to learn separation techniques based on the chemical properties of a substance. PROCEDURE: Before beginning‚ I set up a data table to record data from the experiment. 1. Separating out the Iron a) I used my digital scale to determine the mass of my weighing dish. b) I emptied the entire mixture of solids from the plastic bag into
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Therefore‚ mass is given as m=F/a and has the units of force over acceleration. **A point mass specifies a body that has very small physical dimensions. That is‚ the mass can be considered to be concentrated at a single point. Gravitational Acceleration When making measurements of the earth’s gravity‚ we usually don’t measure the gravitational force‚ F. Rather‚ we measure the gravitational acceleration‚ g. The gravitational acceleration is the time rate of change of a body’s speed under the influence
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frequency of 27 rpm. Find the average speed of the stone if the rope is 12 meters long. Centripetal Acceleration (ac) – the rate of change of tangential velocity; standard unit is meters per square second (m/s2); ac = v2/r = vω Sample Problem: 5. A metal ball is attached to a 1-m long string and is whirled to make 3 revolutions per second with the other end as the center. How much acceleration will the metal ball experience? Centripetal Force (Fc) – the net force
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amplitude of the pendulum is quite small‚ then the time period of the pendulum can be found according to the following equation: ‚ where l is the length of the arm of the pendulum (between the pivot and the centre of mass of the bob) and g is the acceleration due to gravity (on earth ñln9.81). For the spring‚ a similar equation can be derived. For any spring‚ ‚ where m is the mass of the bob on the spring and k is hookes constant. Hookes constant is the constant of proportionality of force against
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purpose of this lab was to prove Newton’s 2nd Law; which states accelerate equals force divided by mass (a=F/m). During this lab we were trying to find out the relationship between acceleration‚ force‚ and mass by using a air track‚ glider with picket fence‚ and photogates. Before I did the lab‚ I had already knew that acceleration‚ force‚ and mass were related. I just didn’t know how they were related. When recording the results of this lab we had to record the applied force in Newton’s. Newtons’s is a
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to show that the acceleration is proportional to the force causing the motion. Theory Newton’s second law of motion states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the total mass. a = net force/ total mass If an object is acted on by a net force ‚ it will experience an acceleration that is equal to the net force divided by the mass. Because the net force is a vector‚ the acceleration is also a vector‚
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