Solution Found!
Answer: (Answers to odd numbered Conceptual Questions can
Chapter 7, Problem 3CQ(choose chapter or problem)
Problem 3CQ
(Answers to odd numbered Conceptual Questions can be found in the back of the book.)
A friend makes the statement, “A force that is always perpendicular to the velocity of a particle does no work on the particle.” Is this statement true or false? If it is hue, state why; if it is false, give a counterexample.
Questions & Answers
QUESTION:
Problem 3CQ
(Answers to odd numbered Conceptual Questions can be found in the back of the book.)
A friend makes the statement, “A force that is always perpendicular to the velocity of a particle does no work on the particle.” Is this statement true or false? If it is hue, state why; if it is false, give a counterexample.
ANSWER:
Step 1 of 2
Here we need to check whether the student’s claim is true or false.
We know that, work is the dot product of force and displacement vector.
.
When the angle between force and displacement is , cosine of
becomes zero and hence the work done also.