Question1
A horizontal 800-N merry-go-round of radius 1.20 m is started from rest by a constant horizontal force of 45 N applied tangentially to merry-go-round. Find out kinetic energy of the merry-go-round after 2.0 s.
Question2
A uniform 1.4 kg rod that is 0.75 m long is suspended at rest from the ceiling by two springs, one at each end of the rod. Both springs hang straight down from the ceiling. The springs have identical lengths when they are unstretched. Their spring constants are 59 N/m and 33 N/m. Find the angle that the rod makes with the horizontal.
Question3
A superhero flies 335 m from the top of a tall building at an angle of 25 below the horizontal.
What is the horizontal component of the superhero's displacement? Draw the vectors to scale on a graph to determine the answer.