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Part 2: Frictional Motion • Search "Forces and Motion: Basics" and select the Friction module • Check the boxes for "Sum of forces", "Values", and "Masses". a) Without changing anything, slowly build up the applied force until FA just overcomes Ff. What was the critical force when FA was just equal to Ff? (i.e. when FA = Ff) b) Calculate the ?s (static coefficient of friction) with the information in step 1. a. m = b. g = c. Ff = c) Notice that as soon as the box begins to move in step 1, it begins to accelerate. If the force is reduced, however, the velocity of the box can be held steady when FA and Ff are equal. Find out what force is required to keep the box moving at a constant velocity after it's moving (when the "Sum of forces" is equal to 0). d) Now calculate ?k (kinetic coefficient of friction) with the information in step 3. a. m = b. g = c. Ff = e) Add the fridge (200 kg) on top of the box and apply the FA required to get the box moving in step 1. Does the load move? Explain. f) Now click the circular 'reset' button; also check the same boxes as before. Begin to push the box so that it gets moving and then let go. What force or forces act

          Part 2: Frictional Motion
• Search "Forces and Motion: Basics" and select the Friction module
• Check the boxes for "Sum of forces", "Values", and "Masses".
a) Without changing anything, slowly build up the applied force until FA just
overcomes Ff. What was the critical force when FA was just equal to Ff? (i.e. when
FA = Ff)
b) Calculate the ?s (static coefficient of friction) with the information in step 1.
a. m =
b. g =
c. Ff =
c) Notice that as soon as the box begins to move in step 1, it begins to accelerate. If
the force is reduced, however, the velocity of the box can be held steady when
FA and Ff are equal. Find out what force is required to keep the box moving at a
constant velocity after it's moving (when the "Sum of forces" is equal to 0).
d) Now calculate ?k (kinetic coefficient of friction) with the information in step 3.
a. m =
b. g =
c. Ff =
e) Add the fridge (200 kg) on top of the box and apply the FA required to get the
box moving in step 1. Does the load move? Explain.
f) Now click the circular 'reset' button; also check the same boxes as before. Begin
to push the box so that it gets moving and then let go. What force or forces act

Part 2: Frictional Motion
• Search "Forces and Motion: Basics" and select the Friction module
• Check the boxes for "Sum of forces", "Values", and "Masses".
a) Without changing anything, slowly build up the applied force until FA just
overcomes Ff. What was the critical force when FA was just equal to Ff? (i.e. when
FA = Ff)
b) Calculate the ?s (static coefficient of friction) with the information in step 1.
a. m =
b. g =
c. Ff =
c) Notice that as soon as the box begins to move in step 1, it begins to accelerate. If
the force is reduced, however, the velocity of the box can be held steady when
FA and Ff are equal. Find out what force is required to keep the box moving at a
constant velocity after it's moving (when the "Sum of forces" is equal to 0).
d) Now calculate ?k (kinetic coefficient of friction) with the information in step 3.
a. m =
b. g =
c. Ff =
e) Add the fridge (200 kg) on top of the box and apply the FA required to get the
box moving in step 1. Does the load move? Explain.
f) Now click the circular 'reset' button; also check the same boxes as before. Begin
to push the box so that it gets moving and then let go. What force or forces act

Added by Andre P.

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