six identical vertical metal bars start at the positions shown below and move at constant velocities through identical magnetic fields. the bars make electrical contact with and move along frictionless metal rods attached to light bulbs.

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?