A wagon is relocating on tracks at a speed of 10 m/s, collideselastically v a wagon movingalong the same track with a speed of 5 m/s and in the samedirection.(a) transform this difficulty into a more familiar one, in which thesecond wagon is consideredto be at rest. Use the concept of loved one velocity to do make thistransformation.(b) In this reworked structure where the second wagon is in ~ rest,what are the speed of thetwo wagons after ~ collision.(c) In the framework of the original problem (i.e. No relativevelocities considered), what room thevelocities the the 2 wagons ~ collision? (Hint: transform youranswer in (b) ago to theoriginal instance described in (a))




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You own an 800 kg 4WD truck and you decision to go aid a girlfriend whogot stuck on a steep snowy hill road in his 400 kg Porche. Thegrade the the roadway is 30%, meaning it makes an angle of 17 degreeswith the horizontal. You position your truck just above his car andattach a tow rope. You figure you"ll have the ability to pull that outbecause girlfriend have better tires. However, together you shot to tow the car,both vehicles begin to slide down the slope, the car below thetruck. The coefficient of kinetic friction between your tires andthe road is ?k=0.35 while because that his car it is ?k =0.25.A) What is the acceleration of every vehicle?B) What is the stress and anxiety in the tow rope?C) describe what would take place quantitatively (i.e., giveaccelerations) if her truck had actually been positioned below the carinstead of over the car and they both began to slide.


Josef is late for a wedding and also is speeding under a straight road at 145km/hr once he overcome an officer sitting in a police car parked behind a billboard in ~ the side of the road. Two seconds after Josef"s auto passes him, the officer accelerates the police car from rest and maintains a preferably acceleration of 8.5km/hr.s until he will a peak speed the 210km/hr. Eventually, the officer it s okay within 150m the the speeding vehicle and also turns on the flashing lights. Josef watch the lamp in his rearview mirror and panics, slamming top top the brakes and starting to skid. Josef"s auto slows down at a price of 5.5m/s2. That takes the officer 0.5 seconds to establish what is happening and also to move his foot come the brake pedal before he deserve to start to sluggish down. The police automobile slows down at a rate of 6m/s2.
a) exactly how long after Josef an initial passes the police automobile does the take prior to the officer transforms on the flashing lights?
b) How far has each automobile traveled from the billboard when the officer transforms on the flashing lights?


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d) perform the 2 vehicles collide? If so, at what rate (relative come Josef) walk the police car strike Josef"s vehicle? If not, what is the smallest distance the separates the two vehicles?