Energy : Energy cannot be created cannot be destroyed It can only be converted from one form to another form
Potential energy is the stored energy an object has because of its position or state. A bicycle on top of a hill, a book held over your head, and a stretched spring all have potential energy. Unit-Joule (J)
Kinetic energy is the energy an object has due to its motion. As long as an object is moving at the same velocity, it will maintain the same kinetic energy. The standard unit for kinetic energy is the joule (J).
When the Bicycle is at the top of the hill it has the most potential energy.As the boy is stopped at the top of the hill,he has only Potential energy ,or stored energy. He is not doing any work
This boy riding a cycle up a hill has kinetic energy .He is in motion and he is at work to get to the top of hill.He is also building up Potential energy ,Energy to be released on his way back down the hill.
As the boy rides down the hill,he has both Kinetic and Potential energy.He is doing work ,and assisting him in his descent is gravity,a force that is helping him release his stored energy.
1-Initial position of ball . Ball is moved in 1-2-3-1-2-1 posi2-Maximum potential energy attain area 3-Ball is released from postion 2 and it is reached at position 3 because of Kinetic energy .And it will move to and forth The stored energy is called Potential energy
At the maximum extent he come back to his orginal postion that is because of kinetic energy BOY IS IN REST POSITION
When a roller coaster crests the first big hill, gravity takes over, causing the roller coaster to fall down at a constant rate of 9.8 meters per second squared. All that stored potential energy changes to kinetic energy.
Since roller coasters don't have engines, they must be pulled by a motorized chain to the top of the first big hill. As the roller coaster rises higher and higher into the air, its potential energy keeps growing until it reaches its maximum potential energy at the crest of the hill.
Some people also love the weightless feeling you get briefly at the top of a loop-the-loop. That feeling you get is caused by two forces countering one another.Gravity is pulling you toward the ground at the same time as Inertia is pulling you toward the top of the loop.
5 That's because the roller coaster loses energy to other forces as it does loop-the-loops, curves, and other hills along the way. These other forces eventually bring the roller coaster to a stop, albeit with some help from air brakes at the very end of the ride
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In the case of a roller coaster, this means that the kinetic energy built up from the fall down the first hill could keep it going forever. We all know, though, that roller coaster rides don't last forever. That's because the roller coaster loses energy to other forces as it does loop-the-loops, curves, and other hills along the way.
As the roller coaster falls, it accelerates and builds up enough kinetic energy to propel it through the remainder of the ride. No engine is required becauseof inertia. Inertia is one of the laws of physics described long ago by Sir Isaac Newton. The law of inertia holds that an object in motion will stay in motion until acted upon by an equal but opposite force.
On Earth, you’re in an environment of 1 G. Accelerate away from or in the same direction as the Earth’s pull on your body, and you create an equal and opposite reaction that you can feel in your weight. Accelerating around a horizontal turn also creates G-force, in this case called “lateral G.” If strong enough, lateral Gs can sometimes throw passengers against the side of a train car. To avoid this, roller coasters are often built with banked turns. This helps convert some of the lateral G into a positive or negative G, reducing the amount you slide about.
HOLD ONTO YOUR STOMACH ! As you upside down your body experiences a centrifugal force that force keeping you firmly in your seat ,even when you are completely upside down .
Roller coasters today employ clothoid loops rather than the circular loops of earlier roller coasters. This is because circular loops require greater entry speeds to complete the loop.If the radius is reduced at the top of the loop, the centripetal acceleration is increased sufficiently to keep the passengers and the train from slowing too much as they move through the loop. A large radius is kept through the bottom half of the loop, thereby reducing the centripetal acceleration and the G’s acting on the passengers.
POTENTIAL ENERGY
KINETIC ENERGY
