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Nasc3 ass3

Published on: Mar 3, 2016

Transcripts - Nasc3 ass3

• 1. Projectile motion is a form of motion where a particle (called a projectile) is thrown obliquely near the earth's surface, and it moves along a curved path under the action of gravity. buoyancy /ˈbɔɪ.ənsi/ is an upward force exerted by a fluid that opposes the weight of an immersed object. Hooke's law is a principle of physics that states that the force needed to extend or compress a spring by some distance is proportional to that distance. That is, The coefficient of restitution (COR) of two colliding objects is a fractional value representing the ratio of speeds after and before an impact, taken along the line of the impact. STATIC FRICTION : the force between two bodies in contact that resists the initiation of sliding motion of one over the other : the force required to cause one of the bodies to begin to move when they are at rest —called also starting friction Kinetic friction- the force that opposes relative motion between surfaces in contact. Kinetic friction is friction applied to a moving object. This is the opposite of static friction which applies to a non- moving object Drag – is the air or fluid resistance of an object. circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. Torque is a measure of how much a force acting on an object causes that object to rotate. Elastic potential energy is Potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring. Gravitational potential energy can be defined as the energy an object possesses because of its position in a gravitational field commonly used for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2.