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problem 1: You are driving at 53 km/h when a child runs out into the street. You bang on your brakes and screech to a stop just short of the child, all of this takes only 1.2 seconds. If the mass of your car is 1300 kg, determine the co-efficient of friction between your tires and the road?

problem 2: A large stone (m = 250kg) is being pulled by two trucks. One truck pulls with a force of 800 N due north, the other pulls with a force of 100 N at 30º E of N. Find out the acceleration of the stone?

problem 3: A 15.0 kg box is being pulled up a ramp by a force of 100 N. The ramp is angled at 25.0º and has a co-efficient of friction of .190. Determine the acceleration of the box?

problem 4: In a condition where a mass of 3.5 kg is sitting on a level surface and connected over a pulley to a hanging 2.5 kg mass, compute the acceleration of the 2.5 kg mass if the co-efficient of friction of the level surface is .245.

problem 5: Two ice skaters push away from one other on the ice. One skater has a mass of 60 kg and the other has a mass of 42 kg. If the 60kg skater has an acceleration of 1.3m/s2, determine the acceleration of the second skater?

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