Newtons Laws
Published on Jan 29, 2016
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Newton's first law of motion states that objects in motion stay in motion and objects at rest will stay at rest unless acted on by an outside force. When I started zip lining I was in motion so I stayed in motion until there was an outside force, which was the stopper, that stopped me from moving any further.
Photo by sameffron
The second law of motion states that the rate of change of momentum is equal to the applied force. The mass of the tennis ball is constant. So the initial acceleration of the tennis ball when hit by the racquet is directly proportional to the force applied by the tennis player. When hit with a different mass, such as a softball there is not the same constant and the softball will not go as far or as accurate
Photo by suzannelong
Newton's third law of motion states that every action has an equal and opposite reaction. When I was bending my knees getting ready to jump, I was exerting a force on the ground. When I jumped up in the air, the ground had an equal and opposite reaction, and pushed me upwards. This caused me to jump in the air, based on the two equal and opposite actions of my body exerting the force and the ground pushing back up.
Photo by *vlad*
