> > > > Problem 26E

# In a laboratory experiment on friction, a 135-N block ## Problem 26E Chapter 5

University Physics | 13th Edition

• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants University Physics | 13th Edition

4 5 0 330 Reviews
17
3
Problem 26E

In a laboratory experiment on friction, a 135-N block resting on a rough horizontal table is pulled by a horizontal wire. The pull gradually increases until the block begins to move and continues to increase thereafter. ?Figure E5.26 shows a graph of the friction force on this block as a function of the pull. (a) Identify the regions of the graph where static friction and kinetic friction occur. (b) Find the coefficients of static friction and kinetic friction between the block and the table. (c) Why does the graph slant upward at first but then level out? (d) What would the graph look like if a 135-N brick were placed on the block, and what would the coefficients of friction be?

Step-by-Step Solution:
Step 1 of 3

ANSWER: The weight of the block is, N = mg = 135 N . Where N is the normal reaction and also defined as weight. a) In the graph at the point (75,75) static friction occurs and at the point (75,50) kinetic friction takes place. b) We know that, the static friction is, F max= S N= S = S 135. As the graph shows that, when the frictional force reaches 75 N, the pull remains constant and the frictional force decreases too. 75 N = ×S135 =S75/135 = 0.555 The kinetic friction also obeys same type of equation, which is, F = K N = KN = K 135 According to the graph,...

Step 2 of 3

Step 3 of 3

#### Related chapters

×
Get Full Access to University Physics - 13 Edition - Chapter 5 - Problem 26e

Get Full Access to University Physics - 13 Edition - Chapter 5 - Problem 26e

I don't want to reset my password

Need help? Contact support

Need an Account? Is not associated with an account
We're here to help