While the truck ks driving to South Bend, he accelerates from 31 m/s to 40 m/s to pass a car in 10 seconds. What was the trucks acceleration?

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

Can anybody me with this? ? (picture included.)

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.