1 Net Force Two people are pushing a car across a parking lot. The car has a mas

Question

1 Net Force Two people are pushing a car across a parking lot. The car has a mass of about 1,000 kg. First, they take turns pushing. When Person A pushes the car, the car accelerates at a rate of 20 cm/s2. When Person B pushes the car, it accelerates at a rate of 30 cm/s (a) Both people stand behind the car and push in the same direction. What is the net force on the car? How fast will the car accelerate? (c) Person A stands at the back of the car and Person B stands at the front, and they push in opposite directions. What is the net force on the car? How fast will the car accelerate? In what direction?

Explanation / Answer

Force by A =m*0.2=200 N

Force by B =m*0.3=300 N

Total force=500

Accleration=50 cm/s*s

(b) net force=300-200=100 N

Accleration=10 cm/s*s

Direction =backwards

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