# 6. A woman at an airport is towing her 23.0-kg suitcase at constant speed by pulling on astrap at an angle 0 above the horizontal. She pulls on the strap with a 39.5-N force, andthe friction force on the suitcase is 20.0 N.(a) What angle does the strap make with the horizontal?(b) What is the magnitude of the normal force that the ground exerts on the suitcase?

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Step 1

Draw the free-body diagram of the suitcase as:

Step 2

(a)

The velocity of the suitcase is constant. Therefore, from Newton’s first law of motion, the net force acting on the suitcase will be zero.

Since the net force acting on the suitcase is zero. Therefore, the net force along the horizontal direction will be zero. So, write the force equation along the...

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