# Galileo Drops the Ball - Virtual Experiment

In around 1590 Galileo Galilei (1564-1642) climbed up the Leaning Tower of Pisa and dropped some balls to the ground. Two balls of different masses, but of similar shape and density that were released together hit the ground at the same time. Until then it was commonly believed that heavy things fall faster than light things. Many people still believe this, and casual observation of everyday phenomena often does tend to confirm this view. If you drop a brick and a feather at the same time the brick will probably hit the ground first. But this is because of differences in the amount of friction between these objects and the air around them, not because their masses are different. Galileo’s discovery is important in understanding how parachutes work. Click on the image to the left to try Galileo’s experiment for yourself. Find out more about Galileo Galilei.

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Drawing Free-Body Diagrams Free-body diagrams are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation. A free-body diagram is a special example of the vector diagrams that were discussed in an earlier unit. These diagrams will be used throughout our study of physics. The size of the arrow in a free-body diagram reflects the magnitude of the force.

Force and Motion Facts Motion makes the world go 'round. Motion makes the moon go 'round too. In fact, motion makes lots of things go. When we think of motion we often think of cars, bicycles, kids running, basketballs bouncing and airplanes flying. But motion is so much more. Motion is important to our lives and impacts so many things that we do. Introduction to Embedded Programming - Home Posted by Michael Silva on Aug 20 2013 under Tutorials | Microcontroller Welcome to this Introduction to Microcontroller Programming tutorial series. If you are looking to learn the basics of embedded programming for microcontrollers (and a bit of embedded hardware design as well), I hope these tutorials will help you along that journey.

Acceleration - Physics for Kids! Acceleration is a way to measure how fast something is speeding up. Suppose you are riding your bike. You start out going very slowly, hardly pedaling at all. Now you begin to pedal as hard as you can, to speed up - you are accelerating. The Meaning of Force A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction. Contact versus Action-at-a-Distance Forces For simplicity sake, all forces (interactions) between objects can be placed into two broad categories:

Motion: Forces Forces are a big part of physics. Physicists devote a lot of time to the study of forces that are found everywhere in the universe. The forces could be big, such as the pull of a star on a planet. Design Your Career In Very Large Scale VLSI technology will be propelled by wireless and multimedia communications for the next ten years, which will give the indian VLSI/ASIC designing industry a fillip. So secure your job, position and moolah in this sector Are you a student of electronics engineering? If so, perhaps you have been exposed to the preliminary levels of integrated circuits (ICs) involving small-scale integration (SSI) circuits like logic gates or medium-scale integration (MSI) circuits like multiplexers and parity encoders. There is, however, a much bigger world out there involving miniaturisation at levels so great that even a micrometre or a microsecond is consid ered a huge measure! This is the world of VLSI—very large-scale integration.

Motion: Introduction Motion is one of the key topics in physics. Everything in the universe moves. It might only be a small amount of movement and very very slow, but movement does happen. Don't forget that even if you appear to be standing still, the Earth is moving around the Sun, and the Sun is moving around our galaxy. The movement never stops. Motion is one part of what physicists call mechanics. Determining the Net Force If you have been reading through Lessons 1 and 2, then Newton's first law of motion ought to be thoroughly understood. An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In the statement of Newton's first law, the unbalanced force refers to that force that does not become completely balanced (or canceled) by the other individual forces. If either all the vertical forces (up and down) do not cancel each other and/or all horizontal forces do not cancel each other, then an unbalanced force exists. The existence of an unbalanced force for a given situation can be quickly realized by looking at the free-body diagram for that situation.

Amusement Park Physics Design a Roller Coaster Try your hand at designing your own roller coaster. You will be building a conceptual coaster using the physics concepts that are used to design real coasters. The Future of Wireless Charging and Long-lasting Batteries The Future of Wireless Charging and Long-lasting Batteries Although both solar/kinetic power and wireless charging fall under the ‘portable power’ umbrella, the two should not be conflated. Solar, kinetic and other non-battery topics fall under the umbrella commonly referred to as alternative (i.e., non-electrochemical battery) portable power. Under this umbrella, we have solar, kinetic, fuel cells, RF power harvesting and others. Stu Lipoff, IEEE fellow, discusses with Sustainabilityzero, India, the future of wireless charging and long-lasting batteries Stu Lipoff

How does gravity alter the trajectory of light? Question How does gravity alter the trajectory of light? Asked by: ignotum4ever Answer

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