Need question 2 and question 4 Questions:(1) List three ways to reduce friction between surfaces:(a) lubricting the surface.(b) make the object(c) Make the surfaces little(4)(a)(b)(2) In Part 1 of this experiment, you probably gotinconsistent results. Give three possible reasons(other than human error). Be specific.for this(c)More Streamlined(3) According to theory, the value for us should besmaller than, larger than, or equal to Mk?мумкmer(a) In Parts 1 and 2:Ms 7 MxSmootherlargerWhat did you observe in this experiment regardingthis?(b)Why or why not?In Parts 3 - 7:Мк умсHad the wooded block been turned up on its edge,rather than flat side down, would one expect tomeasure the same values for the coefficients offriction that you measured?Yes or No******************* NamePHYS202LCoefficient of FrictionIn this experiment, the nature of the frictional forcesbetween two objects is investigated. The coefficient ofstatic friction and the coefficient of kinetic friction aredetermined.Procedure:(1) Place the block on the inclined plane (large surfacedown). Incline the plane until the block just beginsto slide; note the angle and record in Table 1.Repeat three more times. Average these four valuesand record.(2) Place the block on the inclined plane and carefullyincline the plane until the block moves down theplane at a constant speed when given a slight pushto start it moving. (This is tricky to do; a fewpractice trials might be needed). Note the angle andrecord in Table 2. Repeat three more times. Averagethese four values and record.(3) Determine the mass of the block (in grams) andrecord in Table 3.(4) Put the inclined plane in the horizontal position.Attach a piece of string to the block and hang thefree end over the pulley. Connect a weight hanger tothe free end of the string. Carefully add mass tothe mass holder to find the minimum mass needed tojust cause the block to begin moving (including theTable 3. umass of the hanger). Record this mass (in grams) in(5) Place a 200 g mass on top of the block and again addmass to the weight hanger to find the minimum massneeded to cause the block to begin moving. Record inTable 3.800 g on the block.(6) Repeat Step 5 by placing masses of 400 g, 600 g and

Answered: Questioner (1) List three ways to…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 123AP: Two blocks connected by a string are pulled across a horizontal surface by a force applied to one of...

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Need question 2 and question 4

Name
PHYS202L
Coefficient of Friction
In this experiment, the nature of the frictional forces
between two objects is investigated. The coefficient of
static friction and the coefficient of kinetic friction are
determined.
Procedure:
(1) Place the block on the inclined plane (large surface
down). Incline the plane until the block just begins
to slide; note the angle and record in Table 1.
Repeat three more times. Average these four values
and record.
(2) Place the block on the inclined plane and carefully
incline the plane until the block moves down the
plane at a constant speed when given a slight push
to start it moving. (This is tricky to do; a few
practice trials might be needed). Note the angle and
record in Table 2. Repeat three more times. Average
these four values and record.
(3) Determine the mass of the block (in grams) and
record in Table 3.
(4) Put the inclined plane in the horizontal position.
Attach a piece of string to the block and hang the
free end over the pulley. Connect a weight hanger to
the free end of the string. Carefully add mass to
the mass holder to find the minimum mass needed to
just cause the block to begin moving (including the
Table 3. u
mass of the hanger). Record this mass (in grams) in
(5) Place a 200 g mass on top of the block and again add
mass to the weight hanger to find the minimum mass
needed to cause the block to begin moving. Record in
Table 3.
800 g on the block.
(6) Repeat Step 5 by placing masses of 400 g, 600 g and

Expert Solution

Step 1

When there is a relative motion or tendency of relative motion between two rough surfaces then friction force comes in to existence. Friction may support a motion or oppose a motion but it always opposes relative motion. Friction forces are of two type :

1. Static friction : When there is tendency of relative motion but no actual relative motion between the surfaces then the friction force between the surfaces is called static friction force.

2. Kinetic friction : When there is a relative motion between the surfaces, kinetic friction works between the surfaces.

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