The uniform rectangular stone block with b=1.2mand h=0.9mis released from rest with its center of mass Gdirectly above the supporting corner. Determine the angular velocity ′of the block about the corner Aimmediately after impact assuming that Aremains in contact with the ground. Also assume that contact occurs at the corners only and that no slipping takes place. What fraction |ΔE|/Eof energy is lost in the impact?

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) ! : )