PhysicsLAB Worksheet
Freebody Diagrams #2

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Refer to the following information for the next four questions.

True or False: The magnitude of the normal, , is smaller than the object's weight.
 
A 5 kg mass is being pulled by a string, acting at an angle θ to the horizontal, across a rough table at a constant velocity. If the tension is 15 N and θ equals 37º, what is the magnitude of the frictional force? 

The numerical value of the normal equals
 
What is the coefficient of friction between the mass and the surface? 

Refer to the following information for the next four questions.

True or False: The magnitude of the normal, , is smaller than the object's weight.
 
A 5 kg mass is being pushed across a rough table at a constant velocity by a constant force, F = 15 N, which acts at an angle θ = 37º to the horizontal. What is the magnitude of the frictional force? 

The numerical value of the normal now equals
 
What is the coefficient of friction between the mass and the surface? 

Refer to the following information for the next six questions.

True or False: The magnitude of the normal, , is smaller than the object's weight.
 
If the angle of the incline equals 37o and the mass remains 5 kg, what is the numerical value of the normal? 

True or False: The mass will accelerate down the incline with an acceleration equal to g sin(θ).
 
If the mass starts from rest, how long will it take to slide down an incline 40 cm long? 

If instead the 5 kg block slid down the 37o incline at a constant velocity, what would be the coefficient of friction between the two surfaces?
 
How large an applied force, F, would be required to slide the mass up the incline at a constant velocity? 


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