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how does the magnetic force exerted by a magnet change as the distance between two magnets decreases?
a. the magnetic force increases.
b. the magnetic force stays the same.
c. the magnetic force decreases.
d. the magnetic force does not change with distance.

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?