A mechanic pushes a 2.80 X 10 kg car from rest to a speed of v,...

  

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A mechanic pushes a 2.80 X 10² kg car from rest to a speed of v, doing 4500 J of work in the process. During this time, the car moves 22.0 m. Neglecting friction between car and road, find each of the following. (a) the speed v m/s (b) the horizontal force exerted on the car N A projectile is launched with a speed of 45 m/s at an angle of 55" above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight. m A mechanic pushes a 2.80 X 10² kg car from rest to a speed of v, doing 4500 J of work in the process. During this time, the car moves 22.0 m. Neglecting friction between car and road, find each of the following. (a) the speed v m/s (b) the horizontal force exerted on the car N A projectile is launched with a speed of 45 m/s at an angle of 55" above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight. m