A String Is Attached to the Rear-View Mirror of a Car.A

question 7

Multiple Choice

A string is attached to the rear-view mirror of a car.A ball is hanging at the other end of the string.The car is driving around in a circle,at a constant speed.Which of the following lists gives all of the forces directly acting on the ball?

• A) tension and gravity
• B) tension
• C) tension, gravity, and the centripetal force
• D) tension, gravity, the centripetal force, and friction

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Definitions:

Alpha

Often referred to as the level of significance in hypothesis testing, it represents the threshold at which the null hypothesis is rejected.

T-test

A statistical test used to compare the mean of two groups to see if there is a significant difference between them.

Null Hypothesis

The hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.

Alpha

The threshold of probability at which the null hypothesis is rejected in statistical testing, often set at 0.05.