Q. Mary weighs 521 N and she walks down a flight of stairs to a level 5.5 m below her starting point. What is the change in Mary's potential energy?
Q. A particle moving with a velocity of 1.3 m/s in the + x direction is given an acceleration of 0.10 m/s2 in the + y direction for 3.2 s. Find the final speed of the particle.