A 60 kg ice skater holds up a large sheet of cardboard that can catch the wind and drive her (frictionlessly) across the ice. While she's moving at 0.5 m/s, a wind that is constant and horizontal for 5.0 s exerts a force on the cardboard of 1.7 N. What is the skater's initial acceleration once the wind begins to blow?
F = m a
1.7 = 60 a
a = 1.7/60