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1) A motorist travels at 14 m/s when he sees a deer in the road 37 m away. Maximum negative acceleration is 7 m/s
2
.
What is the max. reaction time so he avoids hitting the deer??
V=14m/s
X=37 m
a= 7
t=?
2) A hockey puck sliding on a frozen lake comes to rest after 200 m.
Its initial velocity is 1.2 m/s, what is its acceleration
if its assumed constant?
How long is it in motion?
What is its speed after traveling 146 m?
3) When the initial speed of a cannon ball fired from a battleship is V
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Unformatted text preview: o with respect to the horizontal its gives a max range R. What is the time of flight T max ? Max Height h max ? Speed Vh max ? max 2 sin45 2 o o V V t g g ° = = 2 2 2 max sin 45 1 2 4 o o V V h g g ° = = max 1 cos45 2 o o Vh V V = ° = 4) How tall is the building? 5) A daredevil jumps a canyon. What is the min. speed to clear the canyon? What is the speed at the other side?...
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This note was uploaded on 02/09/2009 for the course PHY 320 taught by Professor Lui during the Spring '09 term at University of Texas at Austin.
 Spring '09
 LUI
 Acceleration, Heat

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