. Find the power if
the opposing frictional force is 100 N. Now, suppose after travelling a
distance of 200 m, this car collides with another stationary car (B) of same
mass and comes to rest. Let its engine also stop at the same time. Now car (B)
starts moving on the same level road without getting its engine started. Find
the speed of the car (B) just after the Collision.
Answer:
Mass of car (A) =1000 kg
Mass of car (B) = 1000 kg
Force applied by car (A) = 100 N
Speed of car (A) 
Power of car (A),P = Fv = 100 x 10 =1000 W
Again F = ma
100 = 1000 x a
From equation of motion, 
From conservation of linear momentum,
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