Lab Report 5 Newton’s Laws Dillon Harper 06/27/15
Objective: During this lab Newton’s Law of static and kinetic friction was studied. The static and kinetic frictional coefficients were found for a block while sliding down a track through experimental trials.
Theory: In most experiments with tracks there is usually a cart involved to discount the frictional force. In this experiment a block is used because the surface area of the block has a larger frictional force with the surface of the track that can be measured. Fictional force is the force that resists the sliding of the block down the plane of the track. Therefore, this force is in the opposite direction of motion and parallel to it. When a force F is applied there is a static frictional force that comes into play. The static frictional force is seen to be fs and the maximum amount of static friction is found by the equation below: Eq. (1)
If the force is seen to be less than fs,max in any circumstance then the object that has the force applied to it will not move due to its equilibrium. Static friction is represented by the following equation.
Eq. (2)
If the force is greater than μsN then the object that has that force on it will begin to move in the direction of the force. On the other hand kinetic friction is described by the equation below.
Eq. (3)
In this equation μk is the coefficient of kinetic friction and fk is the kinetic friction.
In most
To create a mousetrap car and measure its performance. We will also see where force and energy is impacting on the performance, for example friction will impact on the cars performance as it generates heat and slows to car down thus meaning that the car may not travel as far as it should. Another force that is demonstrated in testing of the car kinetic energy, without kinetic energy the car would not travel at all.
ground, so it accelerates. If the track tilts up, gravity applies a downward force on the back of the
The object furthest to the right is the motion detector that will measure the object's position and time and send it to the LabQuest. The object to the far left is the stopper that will stop the cart after it has completed its run. The materials we needed to complete this lab was a motion detector, a cart, ruler, cart track, and LabQuest. The motion detector measured the time as soon as the cart was set in motion and delivered the data to the LabQuest. The cart was used to measure the velocity for each run. The cart track was the medium we used to push the cart down and collect
Next, the independent variable was the sail car and shed car. The speed acceleration was the dependent variable. The constants marble distance of photogate the angel of the track.
To investigate and observe how the acceleration of a mass depends on the resultant forces acting on it, along with its mass, and to furthermore define the relationship between acceleration, net force, and mass as a single equation.
The lab 4.1 “What a Drag” was mainly about how friction affects most of our everyday things that people do or use . The “What a Drag” lab shows how friction can pull a block over 5 different surfaces. The different surfaces for each block has a different weight . On the Other hand, each of the surface area has a different surface but each blocks are the same.
We were given groups to design and make a mousetrap powered car that will roll as far as possible. This will be measured and be put into a graph. We will make three modifications to our mousetrap car over the course of the experiment. We have a variety of different materials, including plastic, wooden wheels and a dowel, screws, mousetrap, blue tack and a piece of string. Forces were acting in a negative way and a positive way on the car. Gravity was pulling the car down to the ground. Uplift was pushing up upon the car against gravity. Drag was also known as friction, holding back the car while it was moving. Thrust was in the cars favour, pushing forward against the force drag. There were also many forms of energy being used and being wasted like heat and sound energy. Potential energy was stored in the mousetrap, propelling itself forward. Kinetic energy was also demonstrated when the car started to roll.
where F is force and τ is torque. (The torque is the force times the lever arm, r) The first condition, ΣF = 0, is concerned with translational equilibrium and ensures that the object is at rest or is moving at a uniform linear velocity. The second condition, Στ = 0, is concerned with rotational equilibrium and ensures
Newton's first law in laymen terms is 'An object in motion tends to stay in motion, and an object at rest tends to stay at rest, unless the object is acted upon by an outside force.' You would feel the law if you were in a fast moving car, lets say 70 mph, which suddenly comes to a stop. You would continue to move forward (If you didn?t have a seat belt on) but the car would come to a stop. You would then continue to move through the air at 70 mph until you hit
When the mousetrap car moves down the track, the speed of the mousetrap car decreases, therefore my hypothesis was supported. At 1 second, the mousetrap car was traveling at a speed of 3.2 m/s. At 2 seconds, the mousetrap car was traveling at a speed of 2.35 m/s. At 3 seconds, the mousetrap car was traveling at a speed of 1.53 m/s. At 4 seconds, the mousetrap car was moving at a speed of 1.2 m/s. At 5 seconds, the mousetrap car was traveling at a speed of .98m/s. “A car will eventually come to a stop if just allowed to roll as the friction between the road surface and the wheels causes friction that causes the vehicle to stop,”(Examples of Rolling Friction). The evidence supports the claim because the wheels of the mousetrap car are moving
Newton’s laws of motion are three physical laws that describe the connection between a body and the different forces acting upon it, as well as its motion in response to those forces. Isaac Newton developed Galileo’s ideas further and developed three law of motions. Newton’s First Law of Motion states that an object at rest with remain this way unless if it affected by a force. Also if an object that is moving will continue at the same speed as well as the same direction until an unbalanced force acts upon it. An example of unbalance force is when a scooter is being driven, the friction and air resistance is going at it, the weight of the scooter is keeping the weight on the ground, the reaction force is going up and the thrust of the scooter going forward. The force’s tendency to resist any change in motion is called an object’s inertia. Newton’s Second Law of Motion states that an object will keep on accelerating in the direction of an unbalance force acting upon it. The mass of the object and the size of the force acting depends upon the size of the acceleration., F_net=m x a, is the formula to work out the total amount of force acting upon an object. This formula can be
5. What’s really meant is that the forces are the same but going in different directions as a mirror image of one another. So when one force is going for example 2 newtons in a positive direction, the same amount is going in the opposite direction.
Miller held over 100 patents, and he invented many of the safety devices used in today’s coasters. One of his contributions was the safety chain dog, which prevents the train from rolling backward if the lift chain breaks. Miller patented this ingenious device, which is the cause of the clanking sound heard when the train is pulled up the hill, in 1910. Two years later, Miller patented the brilliant invention of the under friction wheels. Coaster cars have three sets of wheels: a weight-bearing set riding on top of the track; a set inside the track keeping the cars on course; and a third set - the under friction wheels under the track, which lock the cars to the track (Harris).
The main objective of this lab was to measure the friction force it takes to start moving a weighted block across a table, and as it continued to move. This force was tested experimentally in three separate ways. The force was then solved graphically and mathematically through six different runs per method. TALK ABOUT RESULTS HERE.
When you start moving that's when the motor lets go then you have kinetic energy when it falls it builds up enough energy to propel the rest of the ride. Even though you don't notice or think about it gravity is the reason you stay on the track.