[SHOW YOUR WORK] A 2000 kg car at rest at the top of a 1000 meter high hill rolls down to the bottom. a) Assuming no friction is acting to slow
down the car as it rolls down the hill, how fast is it going when it reaches
the bottom of the hill? b) Assuming that there is friction stopping the car
when it reaches the bottom of the hill - how much work is done to stop
the car? c) How much friction force is required to stop the car in 100
meters?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?