Problem: How do pulleys affect the load on a system?" What I’m Trying to Prove: The purpose of the experiment is to find out if the number of pulleys affect the force needed to lift a load. Hypothesis : Yes, we can using simple machines such as pulleys because they increase Mechanical Advantage (MA) by decreasing force of weight used. The more pulleys, the higher MA, hence, lighter load. That is why I think you can lighten a load with pulleys. Materials: 7 pulleys 3 weights Rope Spring(Stretch not compression) Cardboard Marker Brass Push Pin Procedure: Connect pulleys Hang one fixed pulley on hook and connect rope Hang one fixed pulley on hook and connect rope to movable pulley Hang two fixed pulley on hook and connect rope to both movable …show more content…
Each movable pulley adds 2 ropes pulling at the load so if there is one movable pulley then there are 2 ropes pulling the weight up so the weight is distributed evenly, hence, the force needed is 2x less than original weight but, since there are 2 ropes so the length you pull is also distributed and thus you have to pull 2 times more t get the weight to lift. Ex to lift 10 cm of the ground you have to pull 10 x number of ropes. Doing this project taught me about Mechanical Advantage (MA): MA is the number of force amplification achieved by using a tool, mechanical device or system, or simple machine which in this case are movable pulleys. I also learned about pulleys: Pulleys are a type of of simple machines. They are a variation of a wheel and axle. Fixed pulleys just change the direction of force but add some movable pulley and that’s when you see the magic. Movable pulleys affect MA. The number of movable pulleys times 2 equals MA. Here are some formulas I learned. Here are the variables: N = Number of ropes MA = Mechanical Advantage D = Distributed weight on each
3. As engine speed increases above engagement, the primary clutch squeezes together some more and pushes the belt so that it moves to a larger radius on the primary. Because the two clutches rotate about fixed points, the belt gets pulled into the secondary, spreading it farther apart and moving the belt to a smaller radius.
to get an idea of how I would do my real experiment and what apparatus
In the experiment “ Talking to plants “ from Mythbusters, potential problems include the use of greenhouses with no sound insulation, a non-homogeneous location and the use of only one specie to infer on a population. In another scientific study, researchers chose to use “ a noiseless growth chamber to prevent any effects from extraneous noise “ and the use “ growth chambers under continuous light at 28 c and 65-75% relative humidity “ in order to maintain a homogeneous location for all plants during the experiment (Jeong et al., 2008) . This helped further explain the findings because with the use of noiseless chambers you can assure that the only noise that the plant was receiving was the one given in the treatment and a valid conclusion
Prompt: Define Newton’s Third Law, give three effects of it, and create an experiment designed to explore one aspect of it.
Planning Firstly here is a list of equipment I used. Boiling tubes Weighing scales Knife Paper towels 100% solution 0% solution (distilled water) measuring beakers potato chips Cork borer. We planned to start our experiment by doing some preliminary work. We planned to set up our experiment in the following way.
In this inquiry the relationship between force and mass was studied. This inquiry presents a question: when mass is increased is the force required to move it at a constant velocity increased, and how large will the increase be? It is obvious that more massive objects takes more force to move but the increase will be either linear or exponential. To hypothesize this point drawing from empirical data is necessary. When pulling an object on the ground it is discovered that to drag a four-kilogram object is not four times harder than dragging a two-kilogram object. I hypothesize that increasing the mass will increase the force needed to move the mass at a constant rate, these increases will have a liner relationship.
The acceleration of a body or object is directly proportional to the net force acting on the body or object and is inversely
...hese complex machines make work easier for us. Simple machines are also useful. For one they make up all complex machines. They also make work more manageable.
In a DC motor, the armature consists of any number of windings, each one an electromagnet. The armature is immersed in a directional external magnetic field. This external field does not move, and can come from permanent magnets or electromagnets.
Energy efficient motors use more copper and iron than regular motors. They also consume less energy than regular motors.
The acceleration of a body or object is directly proportional to the net force acting on the body or object and is inversely proportional to its mass. (F=ma)(Newman)
Planning and Method. Any experiment needs variations as well as fairness to be a true success. The two variations I will include in this experiment shall be: 1) The number of paperclips on the bottom of the helicopter. 2)
According to dictionary.com,” Mechanical Engineering is the branch of engineering dealing with the design, construction, and use of machines.” Their job is to take an idea and actually make it happen. Doing this takes a lot of knowledge and skills. They first start off with an idea that they have. Then they try to make a small module of it. They do this so they know what the product will work without spending a lot of money on it. They have to find the right materials to do this. The materials have to be able to withstand a lot of things nature has to throw at it. Like rain, dust, lightening, and many more things. After they have to make sure the produce is safe. When all of this is done they build the real thing.
Law two can be used to calculate “the relationship between an objects mass (m), its acceleration (a), and the applied force (f) is F= ma.” This formula is used in all of the above components in the car.
Electrical motors play an important role in today’s society, from powering domestic appliances like blenders to industrial equipment such as trains. It almost seems impossible to not use an electric motor in our daily lives. In the comfort of our home, electric motors will operate fans, refrigerators, and air conditioners to just name a few. Researchers are constantly looking for new ways to incorporate electrical motors into our lives. Electrical motors function by converting electrical energy into mechanical energy by using the energy stored in the magnetic field (Sarma, 1981).