Unit+1+2015

Unit 1: Physics Skills and Basic Motion
Friday







Wednesday



MONDAY: Print off two copies. One for you and one for a student who doesn't follow twitter.





Tuesday



Wednesday

Link to today's worksheet: [|motion problems]

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PRACTICE TEST

__Conceptual Questions__
 * 1) What is the difference between a scalar quantirty and a vector quantity? Give two examples of each
 * 2) How can you be accelerating if your speed isn't changing?
 * 3) What is terminal velocity? What force causes it?
 * 4) Is a parachutist that has deployed his/her parachute in free-fall? Why or why not?
 * 5) Why ia "34 degrees" an insufficient answer to a directional (theta) question? What is it missing?

__Practice Problems__


 * 1) K = 1/2*mv^2 solve for v
 * 2) A cockroach is crossing a 2 meter wide table at 0.05 m/s at the same time a beetle is crossing in the opposite direction at 0.03 m/s. Where do they meet on the table and how long does it take?
 * 3) An old car starts from rest and accelerates at 6.7 m/s2 until it reaches a speed of 55 miles per hour. What was the distance traveled? (1 mile = 1.6 km)
 * 4) A police cruiser watches a speeder pass him going a constant 85 miles per hour. If the cop car immediately accelerates at 24.5 m/s2, how long does it take to catch the speeder and how far down the road is it? (1 mile = 1.6 km)
 * 5) A cannon is shot off the edge of a 300 meter cliff directly into the air at 170 m/s. How long does it take for the cannonball to hit the ground? What velocity is it when it hits the ground? What is the maximum height?
 * 6) A baseball is thrown directly into the air from an initial height of 2 meters at a velocity of 20 m/s. At what time(s) is the baseball moving at one-third the speed of the initial throw? When will the ball pass the 3.5 meter mark?
 * 7) An object is thrown downward off the edge of a cliff from a total height H. How high does the initial height have to be so that the object hits the ground with a velocity exactly five times the initial?