A 20-kg block starts from rest on a 36.87° frictionless incline as shown. The block is released, and its COG
drops 6 meters as the block slides to the bottom.
What is the block's GPE prior to being released?
b. What is the block's KE at the bottom?
What is the speed of the block on the frictionless
horizontal?
a.
C.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?