Chapter 2 - HWQ2: A commuter backs her car out of her garage with an acceleration of 1.40 m/s. (a) How longdoes it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, what isher deceleration?Q3 : A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is2.10 x 10* m/s? and 1 85 ms (1ms =10s) elapses from the time the ball first touches the mittuntil it stops, what was the initial velocity of the ball?Q4: A bullet in a gun is accelerated from the firing chamber to the end of the barrel at an averagerate of 6.20 x 10° m/s for 8.10x10 s. What is its muzzle velocity (that is, its final velocity)?Q5 : While entering a freeway, a car accelerates from rest at a rate of 2.40 m/s for 12.0 s. (a)Draw a sketch of the situation. (b) List the knowns in this problem. (c) How far does the cartravel in those 12.0 s? To solve this part, first identify the unknown, and then discuss how youchose the appropriate equation to solve for it. After choosing the equation, show your steps insolving for the unknown, check your units, and discuss whether the answer is reasonable. (d)What is the car's final velocity? Solve for this unknown in the same manner as in part (c),showing all steps explicitly.Q6 : At the end of a race, a runner decelerates from a velocity of 9.00 m/s at a rate of 2.00 m/s(a) How far does she travel in the next 5.00 s? (b) What is her final velocity? (c) Evaluate theresult. Does it make sense?Q7: Freight trains can produce only relatively small accelerations and decelerations. (a) What isthe final velocity of a freight train that accelerates at a rate of 0.0500 m/s for 8.00 min, startingwith an initial velocity of 4.00 m/s? (b) If the train can slow down at a rate of 0.550 m/s*, howlong will it take to come to a stop from this velocity? (c) How far will it travel in each case?Q8: A fireworks shell is accelerated from rest to a velocity of 65.0 m/s over a distance of 0.250m. (a) How long did the acceleration last? (b) Calculate the acceleration.Q9 : A swan on a lake gets airborne by flapping its wings and running on top of the water. (a) Ifthe swan must reach a velocity of 6.00 m/s to take off and it accelerates from rest at an averagerate of 0.350 m/s, how far will it travel before becoming airborne? (b) How long does this take?Q10 : An express train passes through a station. It enters with an initial velocity of 22.0 m/s anddecelerates at a rate of 0.150 m/s as it goes through. The station is 210 m long. (a) How long isthe nose of the train in the station? (b) How fast is it going when the nose leaves the station? (c)If the train is 130 m long, when does the end of the train leave the station? (d) What is thevelocity of the end of the train as it leaves?

Name: Chapter 2 - HWQ2: A commuter backs her car out of her garage with an
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Description: Chapter 2 - HWQ2: A commuter backs her car out of her garage with an acceleration of 1.40 m/s. (a) How longdoes it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, what isher deceleration?Q3 : A well-thrown ball is