How much metabolic energy is required for a 68 kg person to run at a speed of 15 km/h for 18 min ? assume that metabolic power of this running person is 1150 w.

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?

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

What structural formula represents 4 electrons shared between two atoms?