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velocity = speed + direction of motion Things that have both a magnitude and a direction are called vectors. More on vectors in Ch.3. For 1D motion (motion along a straight line, like on an air track), we can represent the direction of motion with a +/– sign. + = going right .
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Figure 4.4 The force exerted by a stretched spring can be used as a standard unit of force. (a) This spring has a length x when undistorted. (b) When stretched a distance Δx , the spring exerts a restoring force, Frestore , which is reproducible. (c) A spring scale is one device that uses a spring to measure force.
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What is motion in physics?
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In physics, themotion is the change in position of an object with respect to its surroundings in a given interval of time. The motion of an object with some mass can be described in terms of thefollowing: • Distance • Displacement • Speed • Velocity • Time • Acceleration. 3 CMPE department-TIU. Main types of motion. 1.
the motion of a body that is released at time t = 0 with an initial velocity ! 0. Two paths are shown in Figure 5.1. The dotted path represents a parabolic trajectory and the solid path represents the actual trajectory. The difference between the two paths ! v is a unit vector in the direction of the velocity.
Links to Physics: Understanding of motion is fundamental to mechanics including constant or accelerated motion of cars to electrons. Other topics will also require the introduction of motion. Examples include wave motion (as in sound and light), electricity and magnetism (movement of force fields) and celestial movement within the heavens.
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• Kinematics – branch of physics; study of motion • Position (x) – where you are located • Distance (d) – how far you have traveled, regardless of direction • Displacement (Dx) – where you are in relation to where you started Distance vs. Displacement • You drive the path, and your odometer goes up by 8 miles (your distance).
Sample Problems. The most fundamental concept in physics is motion. Here we will examine motion progressing from its simplest manifestation to more advanced forms, growing our mathematical toolbox along the way.
