Question

18) (b) Consider the following statement:

       If an object has a changing kinetic energy, then it is subject to a non-zero net force.

(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 seven ice gliders move across a lake with constant kinetic energy and

       they are found not to have a net force throughout.

Answer 1