How to calculate tension force.

Why is alchemy not considered to be a science ?

In all trials, the magnitude of the final velocity for g1 + g2 was less than the magnitude of any initial velocity. as mass increased, what happened to the velocity? the velocity decreased. the velocity increased. the velocity of g1 + g2 could not be measured. the velocity was not affected by the mass increase.

What are two different ways you could find the value of a? explain these methods.