On a aircraft carrier a jet is slowed from 105 mph to a stop in 2 seconds. what is the rate of deceleration?

Can someone explain to me how to do this problem ?

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j