Acceleration
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Magnetic force is the force that attracts or repels objects and is used in many applications. It is used in the Earth's magnetic field and allows magnets to attract and repel each other, as seen when two magnets pull together hard to separate or push away from each other. Magnets can also use this force to levitate metal balls weighing over 2 grams in midair.
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1. Potential energy is energy stored in an object due to its position or state. It is considered energy at rest.
2. Gravitational potential energy depends on an object's mass and height, and can be calculated as GPE = mgh, where m is mass, g is acceleration due to gravity, and h is height.
3. Chemical potential energy is energy stored in chemical bonds. The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another.
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1. PE at point A = mgh = (20 kg)(10 m/s^2)(250 m) = 50,000 J
2. KE at point A = 0 J (velocity is 0 m/s at the top)
3. ME at point A = PE + KE = 50,000 J + 0 J = 50,000 J
4. KE at point B = 1/2mv^2 = 1/2(20 kg)(200 m/s)^2 = 40,000 J
5. ME at point C = ME is conserved. ME at point A was 50,000 J.
6. PE at
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- Metals like iron, nickel, and cobalt have strong magnetic properties. Steel contains iron and carbon, while stainless steel contains chromium and nickel to prevent rusting.
- Magnets are made of materials that can attract or repel each other, with most magnets made of steel or mixtures like alnico containing aluminum, nickel, and cobalt.
- There are three main types of magnets: horseshoe, rod, and bar magnets, which have different magnetic force strengths. Magnets have north and south poles that attract or repel depending on their orientation.
- Magnetic fields can be observed using iron filings or a compass, with the strongest force
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Interactive textbook ch. 18 sec 1 magnets & magnetism
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Brandon
Rocks are composed of minerals that were once living things. Certain rocks like slate and crystals were formed from compressed plant and animal remains over millions of years. Marble is a metamorphic rock that was once limestone composed of microscopic fossils and shells that have been transformed by heat and pressure deep within the earth.
Ana marie
This document provides a brief list of three types of rocks: sapphire, sandstone, and quartz. Sapphire is a gemstone variety of the mineral corundum. Sandstone is a sedimentary rock composed of sand-sized minerals or rock grains. Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework structure.
How Does Rocket Force Work
The document discusses how rocket force works and compares two types of rocket fuel. It examines the third law of motion that for every action there is an equal and opposite reaction. The rocket fuel produces force by burning and the exhaust goes down, pushing the rocket up. A data table shows the effect of different fuels on speed and distance over time based on blows to a water rocket. The conclusion is that rocket force depends on the type of fuel and is related to the third law of motion.
What Makes A Truck Tip Over!!
A truck can tip over if it is too heavy on one side, if it is going too fast when turning, or if the cargo is unbalanced and shifted to only one side of the truck. The document discusses these three main reasons that a truck may tip over - being too heavy on one side, going too fast, or having unbalanced cargo - and suggests that an unbalanced load from having all items shifted to one side is the most likely cause for a truck to fall over when turning.
What Happened To The Tacoma Narrows Bridge
The Tacoma Narrows Bridge in Washington state collapsed on November 7, 1940 after being open for only four months due to high winds that caused the thin bridge to twist and collapse into the water. It took two years to build at a cost of $8 million and was designed to hold 60,000 cars but structural flaws caused it to fail when winds reached 42 mph, earning it the nickname "Galloping Gertie" for the way it would sway in the wind.
Science!
Yes, air causes friction. The document provides examples of how air resistance affects objects in motion like a marble or balls thrown through the air. It describes an experiment where a soccer ball, wiffle ball, and cup are thrown at different strengths over three trials to compare how air resistance impacts how far each object travels. A data table is included showing the distances each object traveled in each trial.
Friction
Friction is the force that occurs when two surfaces rub against each other. Examples of friction include rubbing hands together to create heat, shoes tearing due to walking on concrete surfaces, and using flint and steel to create fires by rubbing them together. An experiment was conducted to test if friction tears up all shoes by rubbing different shoes against sandpaper, with one shoe becoming more torn up than the other due to the effects of friction.
Acceleration
The document discusses acceleration and provides several examples of acceleration in everyday situations. It defines acceleration as a change in an object's speed or direction over time. Some examples given include a car changing speed, a motorcycle braking for a stoplight, a cart moving faster down a hill than up, and a figure skater changing speeds while lifting her leg. The document also describes a student's experiment to measure the acceleration needed to jump 5 inches off ice while varying her speed on the ice.
Velocity &Acceleration
Velocity refers to an object's speed and direction of motion, while acceleration refers to a change in an object's velocity, which can be an increase or decrease in speed. The document discusses how to calculate velocity and acceleration from measurements of distance and time, such as from a baseball hit over 53 feet in 2.84 seconds. A graph and video presented show the speed of a hit baseball over time and distance to demonstrate velocity and acceleration.
Guinea Pig Power Point
The document describes an experiment where a student recorded tug-of-war fights between their two guinea pigs, Thor and Dune, with different amounts of hay. Dune won more fights than Thor, indicating the guinea pigs were using unbalanced forces rather than balanced forces.
Gravity
The document describes several trials of dropping two balls of different masses to observe how gravity affects their motion. The first trial found the time was 16 milliseconds and distance was 40 cm for one ball, while the second trial with a different ball found a time of 26 milliseconds over the same distance. Diagrams and a video were included to illustrate the experiment. The document concludes that gravity impacts everything and was the focus of the reported project.
The Full Project
1) When jumping, a horse's ability depends on the force generated by its back legs and speed. Bigger horses generate more force and are better jumpers than smaller ponies.
2) According to Newton's Second Law, a horse's mass affects the force it can exert for jumping. Jumping form also matters, as riders balance their weight in a two-point position to not impede the horse.
3) Faster gaits like canters provide more force than slower trots, allowing horses to clear higher jumps. The author's experiment found the biggest and fastest horses jumped highest.
The Physics Of Horse Jumping
1) When jumping, a horse's ability depends on the force generated by its back legs which is impacted by speed - the faster the horse is moving, the higher it can jump.
2) Bigger horses generate more force from their back legs and are generally better jumpers than smaller ponies.
3) To balance the horse and rider over a jump, riders stand up in a "two-point" position to shift their weight forward.
My Summary
The document discusses the concept of force. It provides three examples of how force affects motion or interactions. In the first example, the author hits a ball with varying levels of force and measures how far the ball travels, finding that greater force leads to greater distance. The second example notes that using small force won't make someone leave a room but greater force would. The third example is that a professional wrestler would need to use great force to knock someone down, but small force wouldn't achieve that.
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Acceleration
- 1. Magnetic Force By Clay McMillian
- 2. What is magnetic force and how is it used?
- 8. Effect 2 The effect is that the magnets are pushed away [ repelled away ] from each other.
- 10. CREDITS Internet Resources Book Resources Wikipedia, Ed helper Force and Motion By Riley Peter Power Point designed by Clay McMillian
- 11. Thanks for viewing Clay's Presentation