Answer Happy

Consider the following:
If two equal mass objects have the same change in velocity during
an interval,
then they will be acted on by the same net force for that
interval.
(a) Is this statement valid? __________
(b) If you contend the statement is valid, how do you know?
(c) If you contend the statement is invalid, what is wrong with
it?
(d) If the statement is invalid, restate it to give a valid
statement.
(e) Is the valid statement (original, or your revision) a
conditional or a bi-conditional? How do
you know?
(f) Would the following investigation provide data to either
support the valid hypothesis,
contradict, the valid hypothesis
(either the original or your revision), or would it fail to
test the hypothesis? Explain.
Twenty identical carts travel straight
down identical frictionless inclines starting
from rest, all twenty are found to
have equal speeds at the bottom of the inclines.