Speed, Velocity, and Acceleration Concepts PDF

SPEED VELOCITY ACCELERATIO N  SPEED Speed is the rate at which an object travels in a certain distance. Speed is a scalar quantity; has magnitude but no direction.  SPEED Average speed (s)=  SPEED A man walks 20 km in 4 hours. Find his speed.  VELOCITY...

SPEED VELOCITY ACCELERATIO N  SPEED Speed is the rate at which an object travels in a certain distance. Speed is a scalar quantity; has magnitude but no direction.  SPEED Average speed (s)=  SPEED A man walks 20 km in 4 hours. Find his speed.  VELOCITY Velocity is the speed of something in a given direction. It is a vector quantity; has magnitude and direction. VELOCITY velocity(v)=  VELOCITY A person walks 750 m due North, then 250 m due East. If the entire walk takes 12 minutes, find the person’s average velocity.  ACCELERATIO N Acceleration is the rate of “change of velocity” with respect to time. Since velocity is speed plus direction. If you change your speed there is acceleration.  ACCELERATIO N If you change your direction there is acceleration. If you change both there is acceleration.  ACCELERATIO N acceleration(a)=  ACCELERATIO N A car starts from 10 and achieves a speed of 50 in 5 seconds. Find its Acceleration.  ACTIVITY Solve the given problem. A Girl Starts her Motion in a Straight Line at a Velocity of 30 , her velocity is changing at a constant rate. If she stops after 60 s, What is her Acceleration?  ACTIVITY Solve the given problem. If a person travels at a speed of 40 miles per hour. At the same rate, how long will he take to cover 160 miles distance?  ACTIVITY Solve the given problem. John drove South 120 km at 60 km/h and then East 150 km at 50 km/h. Determine a) the average speed for the whole journey?