Question

When a car stops quickly, the front end dips down; the ____ produces the torque responsible...

When a car stops quickly, the front end dips down; the ____ produces the torque responsible for this slight rotation:
a) gravitational force

YesNo    


b) frictional force

YesNo    


c) weight

YesNo    


d) normal force

YesNo    

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Homework Answers

Answer #1

Torque is produced when there is presence of unbalanced force. Let's look into options one by one:

a) Gravitational force: Gravitational force is balanced by normal reaction force of the car, therefore it is not responsible for slight rotation. Moreover, gravitational force on an object is just the weight.

Therefore option a), c), and d) are incorrect.

b) Frictional force: As the center of mass is somewhere in the center of the car, therefore when car suddenly stops the friction force which is acting opposite to the direction of motion will make the car rotate slightly.

Therefore the correct answer is option .

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