A spring of force constant 45 N/m is used to pull a block along a level surface at: constant speed. The spring is observed to stretch 12.0 cm while supplying this force. How much force is applied?

Aparticle moves according to a law of motion s = f(t), 0 ≤ t ≤ 12, where t is measured in seconds and s in feet. f(t) = cos(πt/6) (a) find the velocity at time t (in ft/s).

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

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).