4. A gymnast is on a balance beam that has a length of 5 m. The beam has no mass. Find the
reaction forces at each support. L, = 3 m. Ignore friction.
F=450 N
L,

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?