A 40-Kg Mass Attached to the End of a String Swings

question 45

Multiple Choice

A 4.0-kg mass attached to the end of a string swings in a vertical circle of radius 2.0 m.When the string makes an angle of 35° with the vertical as shown,the speed of the mass is 5.0 m/s.At this instant what is the magnitude of the force the string exerts on the mass?

• A)50 N
• B)82 N
• C)89 N
• D)11 N
• E)61 N

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Definitions:

Biological Evolution

The process through which species of organisms undergo changes over time through genetic variation and natural selection.

Physiological Response

A natural, automatic bodily reaction to stimuli, which can include changes in heart rate, hormone levels, or muscle tension.

Behavioral Response

A behavioral response is an observable action or set of actions taken by an individual in reaction to an external or internal stimulus.

Emotional Response

The psychological reaction to a stimulus, characterized by feelings such as happiness, anger, fear, or sadness.