A car travelling 92 rm kmh is 150 rm m behind a truck, Ask an Expert

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Q. A 45 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.30m from the left end of the plank. How far to the right of the support is the plank's center of gravity?

Q. A car travelling 92 {rm km/h} is 150 {rm m} behind a truck travelling 80 {rm km/h}. How long will it take the car to catch the truck?

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