Free Fall

What is the acceleration if the ball falls vertically?

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ExampleA bus moving at a speed of 40 m/s begins to slow at a rate of 3 m/s each second. Find how far it goes before stopping?

Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley

Example

A ball is dropped from rest at a height of 50 m above the ground. a) What is it speed just before it hits the ground b) How long does it take to reach the ground. (ignore air friction and consider that down is positive).Answers:a) 31 m/sb) 3.2 s