Negative Work Can Be Done

question 40

Multiple Choice

Negative work can be done:

• A)by friction on the tyres while a car is accelerating without skidding.
• B)by a spring at the bottom of an elevator shaft when it stops a falling elevator.
• C)by a hand catching a ball.
• D)by all of the above.
• E)only by (b) and (c) above.

Grasp the concept of critical value and its comparison in hypothesis testing.

Distinguish between significant and non-significant statistical results.

Identify the precise application of specific nonparametric tests based on research questions.

Understand the implications of the exact level of significance in hypothesis testing.

---

Definitions:

Tension

The state of being stretched tight or the mental or emotional strain.

Complete Tetanus

A state of sustained muscle contraction without relaxation, usually induced by rapid, repeated stimulation.

Incomplete Tetanus

A state of muscle contraction characterized by rapid, continuous twitching of the muscle which does not reach maximal strength.

Partially Relaxed

A physiological state where muscles display a reduction in tension without being fully at rest, maintaining some degree of activation.