lecture15 - PHYS 111 Midterm 1 Review A car starts at x=0 m...

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Unformatted text preview: PHYS 111 Midterm 1 Review A car starts at x=0 m and has the following velocity vs. time graph. Draw the corresponding position vs. time and acceleration vs. time graphs. vx t A platform has a radius of 5 m and has an angular displacement as a function of time given by: θ(t) = 5t − 8t 2 (a) Is the platform turning clockwise or counterclockwise at t=0 s? (b) How long does it take for the platform to complete one revolution counterclockwise from t=0? (c) What is the total magnitude of acceleration for an object on the edge of the platform at t=5 s? A plane has an airspeed (i.e., speed with respect to the air) of vp = 100 m/s and is flying at an angle of 30° north of east. The wind is blowing at a velocity ￿w = (20ˆ − 30ˆ) m/s. v i j We have defined the +x axis as pointing east. If the plane flies over a navigation beacon at t=0 s, how far is it from the beacon after 20 minutes? In what direction? h = 10 m d = 15 m d = 15 m You are trying to throw a javelin over a house to impale a zombie on the other side. If the house is 10 m tall at the peak and you are 15 m from the peak, will your throw clear the house? You throw a javelin with a speed of v=20 m/s and the zombie is 15 m from the peak of the house. A car is held up on an inclined, icy (frictionless) ramp by a cable. The ramp is inclined with respect to the ground at an angle of 30.°. The car has a mass of 1500 kg. θ What is the tension in the cable? An elevator travels up 200 m. Safety regulations require a maximum magnitude for its acceleration of 1 m/s2 and a maximum velocity of 4.0 m/s. It starts and stops the trip at rest. How long does it take to make the trip up the full 200m? ...
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This note was uploaded on 01/24/2012 for the course PHYS 100 100 taught by Professor Eric during the Spring '11 term at UBC.

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