A car with mass m = 0.30 kg is attached to two springs, as shown in the figure below. The springs are each attached to two opposite walls and to the car on opposite sides. Initially the car is at rest at ro and the springs are both relaxed. The car is then displaced to the left 4.0 cm and released from rest. Assume that friction is negligible. X=0 (a) If k, is 15 N/m and k₂ is 25 N/m, what is the car's speed when it returns to ro = 0 after having been released? (b) Where is the next position at which the car will be motionless?

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.