Question

Which situation describes a non-contact force changing the speed of an object? Responses a bicycle accelerating as the rider pedals more quickly a bicycle accelerating as the rider pedals more quickly - no response given a ball accelerating as it rolls down a hill a ball accelerating as it rolls down a hill - no response given a gust of wind blowing a leaf away a gust of wind blowing a leaf away - no response given a drawer opening when a user pulls the handle

Answer 1

A situation that describes a non-contact force changing the speed of an object is "a gust of wind blowing a leaf away." In this case, the wind (a non-contact force) exerts a force on the leaf, causing it to accelerate and change its speed.

The other options involve contact forces: the rider pedaling the bicycle, the ball rolling down a hill (which involves gravitational force, but the acceleration comes from the ball physically interacting with the hill), and the user pulling the handle of the drawer (a direct contact force).