B. Free fall - _____________ where the ______________

 

1. Free fall Word Problems

 

Use same method and equations as before

 

Except always remember when you read … an object is dropped:

 

Ø      You Know

 

 

 

 

 

a. Simple Free fall problems

 

Ex) A coin is dropped in a vacuum tube, find its displacement after .3 seconds. 

 

 

 

 

¨      Find the coin's velocity after .3 seconds

 

 

 

 

 

Ex) A rocket is fired vertically upward with an initial velocity of 29 m/s. When the rocket reaches its maximum altitude it has a velocity of 0 m/sec.  Find the rocket's maximum altitude.

 

 

 

 

 

Ex) An object dropped on planet X falls 64 m in 4 seconds.  Find the acceleration due to gravity on planet X.

 

 

 

 

 

 

b. Objects propelled horizontally also fall_______________ at a rate of __

 

 

 

 

 

Ex 1)  A rock is thrown horizontally from the top of a cliff @ 150m/s.  How long does it take the rock to fall 45m vertically?

 

 

           

 

Find the vertical velocity of the rock at 45 meters