Problem 7.24- Enhanced with Feedback Part A What is the tension in the rope hold
ID: 1780633 • Letter: P
Question
Problem 7.24- Enhanced with Feedback Part A What is the tension in the rope holding the 1.0 kg block to the wall? Express your answer with the appropriate units. The 1.0 kg block in the figure is tied to the wall with a rope. It sits on top of the 2.0 kg block. The lower block is pulled to the right with a tension force of 20 N. The coefficient of kinetic friction at both the lower and upper surfaces of the 2.0 kg block is 14 0.360 Figure 1 You may want to review ( pages 169 -112) Value Units Submit My Answers Give Up Part B Figure 1 of 1 What is the acceleration of the 2.0 kg block? Express your answer with the appropriate units. 1 kg 20 N 2 kg alueUnits Submit My Answers Give UpExplanation / Answer
A] Lets call the friction Force between the two blocks as F1 and the Friction force between the large block and the ground as F2. Also we will call the small mass m1 and the large mass m2
Sum of the forces in the y direction,
T - F1 = 0
T1 = F1
T1 = N1 *uk
= m1g*uk
= 1*9.8*0.360
= 3.528 N
B] We know that, F = ma
Fnet = T - T1 - fk
2*a = 20 - 3.528 - (m1 + m2)g*uk
a = (20 - 3.528 - 3*9.8*0.360)/2
= 2.944 m/s^2 Answer