Acrew team rows a boat at a rate of 20 km/h in still water. beginning at time = 0 minutes, the team rows for 30 minutes up a river (against the current). the speed of the current is 1.5 km/h. how long will it take the crew team to row down the river (with the current) to return to the starting point?

22 min
26 min
24 min
30 min

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

Argon, neon, and xenon are examples of