Which method of determining mass involves measuring how much an object resists acceleration? A$.$ gravitational mass B$.$ Newton mass C$.$ inertial mass D$.$ atomic mass $\_\_\_\_19.$ What happens to the gravitational force between two objects if the distance between them is decreased by one$-$half? A$.$ It will remain the same. B$.$ The gravitational force is one$-$fourth as large. C$.$ The gravitational force is $2$ times as large. D$.$ The gravitational force is $4$ times as large. $\_\_\_\_20.$ Which of the following conditions is met when a projectile reaches its maximum height? A$.$ The horizontal component of the velocity is maximum. B$.$ The vertical component of the velocity is maximum. C$.$ The vertical component of the velocity is zero. D$.$ The acceleration in the vertical direction is zero. $\_\_\_\_21.$ Any object thrown into the air with a spin rotates about its A$.$ midpoint. B$.$ center of mass. C$.$ endpoint. D$.$ heaviest side. $\_\_\_\_22.$ When an ice skater pulls in his hands to turn faster A$.$ angular momentum is not conserved. B$.$ his momentum of inertia does not change. C$.$ his rotational speed changes.