A block of mass 5kg slide down an inclined plane that has an angle of 10• if the inclined plane has no friction and the block start at a height of 0.8m, how much kinetic energy does the block have when it reaches the bottom? Acceleration due to gravity is g=9.8m/s^2

26.4 is about the right time

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.