Will you be calculating an instantaneous speed or an average speed of a car that passed through the lines? Justify. Using the formula, If you see a police.

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Presentation transcript:

Will you be calculating an instantaneous speed or an average speed of a car that passed through the lines? Justify. Using the formula, If you see a police officer at the white lines, what variable in the formula (not speed) are you able to manipulate to change the speed through the lines? Explain. Could there have been error on your part in taking the data? Explain. POST LAB QUESTIONS:

DISTANCE SPEED AVERAGE SPEED INSTANTANEOUS SPEED CONSTANT SPEED? DEFINE:

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Heavy vs Light objects Which falls faster? GALILEO VS ARISTOTLE

FREEFALL and ACCELERATION DUE TO GRAVITY Earth’s gravitational pull causes objects to change velocity (accelerate or decelerate). The change in velocity due to Earth’s gravity is called Acceleration Due To Gravity. Freefall is a condition where an object is ONLY experiencing Earth’s gravitational pull with NO air resistance or minimal air resistance. The object can be moving downwards or upwards. The Acceleration Due To Gravity is CONSTANT. Value of Acceleration Due To Gravity is 10.0 m/s 2 Gravity acts downward. Slows you down on way up. Speeds you up on way down. rounded

Acc due to gravity = ‘g’ Freefall equations *These equations are only good if object falls from rest

Gravity causes objects to EITHER gain speed downward or lose speed moving upward (a=g=10m/s 2 ). What is speed of the ball at the peak of flight? What is the acceleration of the ball on the way up? What is the acceleration of the ball on the way down? What is the acceleration of the ball at the peak?

Determine his speed after 35sec of freefall. How far did he fall in that time?

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NO such thing as zero ‘g’ i. Why is there no zero ‘g’? ii. Why is the term used if it is a false statement? iii. What is it about freefall that makes people think gravity has reduced to a zero value?