An object attached to an ideal massless spring is pulled across a frictionless surface. If the spring constant is 45 N/m and the spring is stretched by 0.88 m when the object is accelerating at 2 m/s2 what is the mass of the object

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.