Acrate is located in the center of a flatbed truck. the truck accelerates to the east and the crate moves with it, not sliding at all. what is the direction of the friction force exerted by the truck on the crate?

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) ! : )