Acceleration

Book page 48 -59 1. Give definition of acceleration? -The quantity that describes the change of velocity in a given time interval 2. Give examples of accelerated motion from surrounding world. rocket-increasing its speed as it accelerates towards the unknown. plane-takeoff-accelerate to takeoff speed. 3. How do we find change in velocity? Vf-Vi 4. How do we find the rate at which velocity changes per time interval? acceleration 5. What are the units of acceleration? m/sSquared 6. What affects a human body would feel if the stopping time of a shuttle bus is shorter? falling forward to the front of the bus would be more significant than a longer stopping time. 7. Give examples of positive and negative directions of acceleration. How does the change in velocity affect the direction of acceleration? Speeding up is positive or right or up and slowing down is negative or left or down 8. How do we find acceleration on velocity vs. time graph? it is the slope of the parobolic curve 9. If an object has constant acceleration, how is the average acceleration different from acceleration? it does not differ 10. Describe how displacement is changing for every equal time interval for an object that is accelerating? Please provide examples from a lab. Provide mathematical relationship found in the lab. since the acceleration is positive the displacement for each time interval increases 11. Describe how velocity is changing for every equal time interval for an object traveling with constant acceleration. Provide examples form lab. Provide mathematical relationship found in the lab. for an object traveling with a constant acceleration the velocity will increase with each of the given units, if the acceleration is 4 meters per second squared then for each second you will increase your speed by 4 meters per second

FREEFALL LAB the velocity of a falling object is -9.8m/s you would be going 20mil/hr if you were falling for 1 sec. the mass does not effect the velocity of a falling object. Up&Down Motion 1. the rate at which velocity changes is -10m/s/s that is the slope of the red(velocity vs. time)line. 2. the point of where the velocity changes is the apex of the ball when it changes from up to down. 3. the starting Velocity is 9.8m/s or roughly 24mil/hr 4. at the apex of the height the speed would be 0m/s 5.the speed of the ball right before it hits the ground is about 20m/h or 9.8m/s.