![]() ![]() Physics Formula For Velocity of Chain While Leaving the Table.Physics Formula For Work Done in Pulling the Chain Against Gravity.Physics Formula Gravitational Potential Energy.Physics Formula For Electrical Potential Energy.Physics Formula For Elastic Potential Energy.Physics Formula For Potential Energy Curve.Physics Formula For Comparison of Stopping Distance and Time for two Vechicles.Physics Formula For Relation of Kinetic Energy with Linear Momentum.Work Done Calculation by Force Displacement Graph.Law of Conservation of Angular Momentum.Solution: When the particle is going with speed v 1 and coming back with speed v 2 distance travelled by the particle in going and coming back is same, so average speed will be harmonic mean (Since the runner came back to initial point)Īverage speed is equal to the distance/ time elapsed = 280 meters/ 100 seconds = 2.8 meters/second.Īverage velocity is equal to the displacement/time elapsed = 0/100 seconds = 0.Įxample 3: If a particle moves a distance at speed v 1 and comes back to initial position with speed v 2, what will be average speed? Runs around rectangle twice = 2(140 meters) = 280 meters.ĭisplacement = 0 meter. Solution: The circumference of the rectangle, which is the distance travelled in one round = 2(50 meters) + 2(20 meters) = 100 meters + 40 meters = 140 meters. If the total time he takes to run around the track is 100 seconds, determine average speed and average velocity. He travels around rectangle track twice, finally running back to starting point. (b) The distance traveled during time 0 to 3 s isĮxample 2: A runner is running around rectangle track with length = 50 meter and width = 20 meters. Solution: (a) Instantaneous speed = ds/dt (b) The average speed of the particle in 0 to 3 s (a) Find the instantaneous speed at t = 3s. It a particle starts from some point and returns to the same point, via any path, average velocity in this trip will be zero.Įxample 1:The distance travelled by particle in time t is given by S = 3t 2 + 2. It depends only on the initial and final position of the particle since it depends on displacement. Average Velocity: The average velocity of a particle for a given interval of time is defined as the ratio of its displacement to the time taken.Īverage velocity is independent of path taken between any two points. ![]() In calculus notation, this limit is called the derivative of r with respect to time, written as dr/dt ![]() If the position of a particle changes by △r in a small time interval △t, the limiting value of △r/△tĪs △t approaches zero, gives the instantaneous velocity. It is defined as rate of change of particle position with time.
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