Explain the effect of gravity and air resistance.

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Presentation transcript:

Explain the effect of gravity and air resistance. Today I can… Explain the effect of gravity and air resistance.

Gravity and falling objects A young Italian scientist ______________________ argued that falling objects fall at the same rate. Galileo Galilei

Gravity and falling objects The story goes that he dropped two ___________ from the Leaning Tower of Pisa. cannonballs

Gravity and falling objects Observers were amazed that they fell at the _________. Same time

Acceleration 9.8 m/s2 force mass ____________ due to gravity is _______________. Acceleration 9.8 m/s2 This is the same for all objects because it depends on ___________ and ___________. force mass

Velocity = gravity x time To find the velocity of falling objects, use the equation: Velocity = gravity x time A stone is dropped from a cliff and hits the ground after 3 sec. What is the velocity when it hits the ground? Velocity = (9.8m/s2) x (3 s) Velocity = 29.4 m/s

Air resistance is the __________ that opposes ____________ of objects through ___________. force motion air Label the forces below. Air resistance Net force gravity

Complete the problems. Work ahead! Complete the section summary (page 157).

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