Frictional Resistance, Friction, And The Force Of Motion

Newton 's three laws of motion play a huge role in our everyday life; from driving down the road and catching a baseball. Newton’s laws help us fully understand gravity, motion, and force in three easy-to-understand laws.

Question 2-2: Does the variable you selected in Question 2-1 appear to be directly or inversely proportional to the force? Explain your answer.

To result in a net zero force, the other vector would have to be of the same magnitude as the one shown but in the opposite direction. The stone pushes down on the ground with a certain force and the ground pushes up on the stone with an "equal and opposite" force. the normal force vector

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.

The purpose of this experiment was to investigate the effects of different masses hoisted by an electric motor from ground level to a height of 1.29 m. The main purpose was to look how a change in mass affected the efficiency of our motor, but it did affect other variables such as power, current, force, etc. For this experiment, our hypnosis is that as mass increases, the efficiency increases. Because in the equation for efficiency, efficiency=gain in potential differenceelectrical energy used, gain in potential difference = mgh, the mass of an object has a direct relationship with the efficiency of the motor. In this equation, we see that efficiency is affected by the mass that is lifted, gravity, the height the mass is being lifted, and the amount of energy that is put into the system. We can see that mass, gravity, and height has a direct relationship while inputted power has an inverse relationship with efficiency.

The coefficient of friction, or the μ, is a scalar value which is equivalent to the ratio of the force of friction (FF) between two surfaces to the normal force (FN) which pushes two surfaces together. Each set of surfaces has a different μ, as it depends on the particular materials. Basically, the μ increases as it becomes more difficult for objects to move against each other. When a large amount of force is required to move two surfaces against each other (and therefore a large amount of friction is produced), the μ will be much larger than when a small amount of force is required. For example, the μ of ice on a smooth metal would be very low, while the μ of rubber on rough wood would be much higher.

I thought it would be fun to fling things like raw eggs and rocks with a catapult. Guess

This would not be possible without the help of simple machines, which change the size, direction, and distance of a force it carries out. In other words, simple machines decrease the amount of work it is necessary to complete a task- they change the amount of energy used to move something, change the direction of applied force, and convert one force to another. To illustrate this, a wheel and axle is a simple machine that lessens the amount of work used to move something across distances, such as cars, which move people around easier. The wheel is the rounded part along with the axle which is the post shaped as a cylinder- together they cause movement. In addition, a pulley is another example of a simple machine. Pulleys change the direction of an exercised force. An example of this is a flagpole. The rope helps to lower and raise the flag easilier. Even more, there are four other simple machines including levers, inclined planes, wedges, and screws which are all utilized in Rube Goldberg

In this experiment,we applied Newton`s first law of motion. It descripes the external force as the sum of all external force applied to the object, which equals zero in equilirbium. As we have seen in the experiment, to reach equilibrium all the forces applied on an object shoud cancel each other out and total force reaches zero.Using different forces and weights we were able to reach equilibruim ineach trial of this

The 4 lab activities I did were measuring friction by putting sandpaper on the ramp and seeing how fast the car goes, and the taking the sandpaper off. We also measured gravity by putting more books by the ramp. We measured force by adding washers to see how fast the car will go and we measured mass by adding blocks onto the car. We did these to experiment how fast the car will go with things added to it. I learned that more weight makes it slower, but more force makes it faster.

Friction allows the car’s wheels to spin across the floor without just sliding across the floor. Friction is also present in the gear box of the toy car. Friction is present because the gears have to rotate against each other in order for the toy car to obtain potential energy. The toy car only produces rolling friction, which is present when the wheels rotate against the floor. Rolling also appears in the gearbox. Friction while not energy affects the energy in the toy car in two ways. Friction causes kinetic energy to be lost while the car is moving. Kinetic energy is lost when the wheels rotate against the floor because the wheels are using kinetic energy to move. The energy is then lost when because of rolling friction heat is produced. In a shorter sense the wheels because of friction convert some of the kinetic energy into thermal energy (heat). Energy is also lost when the gears in the gear box rotate against each other. Some energy would be lost because of the friction of the gears some potential energy would be converted to thermal energy affect making less potential energy available. While friction causes a loss to energy, rolling friction allows less work to be able to overcome friction (“About Friction”, 2003). Friction while not energy plays a part in both energies that affect the toy car.

The bigger the mass of the toy car is, the more frictions it will create while rolling down the ramp and therefore the more unbalanced force and speed bumps it will face and slowing it down. So an object with smaller mass will travel much faster than an object with a bigger mass on the same angled ramp.The reason for is hypothesis is that the bigger the mass of an object is, the more contact it will have on the surface of the ramp, therefore creating more frictions. When two solid surfaces (one moving and one still or both moving) make contact with each other and is created frictions. The more friction there is, the slower an object will travel and the quicker an object will

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.

a) There are two main reasons that ships use a foil shaped rudder as opposed to a flat, plate type rudder, and they are both related to each other. First, a foil shaped rudder creates a much greater “lifting” force at smaller angles of attack compared to a flat plate. Second, a foil shaped rudder achieves a higher angle of attack before the rudder “stalls”. The greater lifting, or in this case turning force induced by a foil shaped rudder at smaller angles is a product of the smooth, high velocity, laminar flow across the low pressure side of the rudder more so than the flow across the high pressure side of the rudder. The high-pressure side would cause a greater lift on the flat plate as opposed to the foil using a similar angle of attack because the water is traveling on a straight path, as opposed to a curved path on a foil type rudder, and should move at a lower velocity, which translates into a higher pressure. Therefore, it is the low-pressure side that is pulling the rudder creating the turning moment that turns the ship. The higher rudder angles achievable by a foil shaped rudder are a direct result of the smooth, rounded entry of the foil shaped rudder. This ensures a smooth laminar flow, which causes the separation point to occur much further back on the foil shaped rudder than the flat plate style rudder at higher angles of attack. Because the separation point is held further back along the rudder, the lift associated with

When two objects get in contact with each other the force between them forms. Scientists call this force the frictional resistance, or friction. It occurs because of the imperfections in the surfaces of objects, the molecules of both surfaces interfere with each other creating a natural force between two objects. The friction opposes direction of motion of the object and is parallel to the surface on which the action takes place. The force and magnitude that are necessary to overcome friction can be calculated. Area of objects that is involved in the contact is disregarded when calculating friction.