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Q1. The driver of a truck slams on the brakes when he sees a tree blocking the road. The truck slows down uniformly with acceleration -5.25m/s2 for 4.20 s, making skid marks 62.70 m long that end at the tree. With what speed does truck after that strike the tree?
Q2. A 2kg lunchbox is sent sliding over a frictionless surface, in positive direction of an x axis along the surface. Start at time t = 0, steady wind pushes on the lunchbox in the negative direction of the x axis. The position x of the lunchbox as a function of time t as the wind pushes on the lunchbox. From the graph, estimation the kinetic energy of the lunchbox at (a) t = 1.0 s and (b) t = 5.0 s. (c) How much work does the force from the wind do on the lunchbox from t = 1.0 s to t = 5.0 s?
Phonology: All the data for this problem come from a conservative dialect of Vèneto, a Romance language spoken in northern Italy near the city of Padua.
A 27 pound meteorite struck the car, leaving a dent 24 cm deep in the trunk. If the meteorite struck the car with a speed of 440 m/s, what was the magnitude of its deceleration, assuming it to be constant.
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The valuable coefficient of kinetic friction
A 362 g object is attached to a spring and executes simple harmonic motion with the period of 0.200 s. If the total energy of the system is 6.71 J.
A 1.0 kg block is attached to a spring with spring constant 18.0 N/m. While the block is sitting at rest, a student hits it with the hammer and almost instantly gives it a speed of 41.0 cm/s. What is the amplitude of the subsequent oscillations? The ..
A ballplayer catches a ball 2.75 seconds after throwing it vertically upward. With what speed did he throw it? Calculate the final & resultant velocity and acceleration.
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