an initially resting 300g car is dragged along a horizontal frictionless table by a massless cord. The cord is attached to vertically hanging 60g mass by a frictionless massless pulley. If the car starts from rest, determine the time it would take for it to move 20 cm.

Answer 1

Since F=ma, the acceleration of the car is 1/5 gravity.

So, how long does it take the car to move 20cm, under (1/5)g acceleration?

s = 1/2 at^2