Aphysics student rests her backpack upon his shoulder. the backpack is suspended motionless by one strap from one shoulder. which free-body diagram best represents this situation?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

The ozone hole appears in antarctica during