Three blocks of masses M1 = 4 kg, M2 = 8 kg, and M3 = 7 kg are placed on a frictionless, horizontal floor as shown. Two horizontal forces (Ff = 25 N and Fb = 80 N) are applied to blocks M1 and M3 so that the blocks accelerate. 1) What is F3on2, the magnitude of the force that block M3 exerts on block M2? _____ N 2) Three blocks of masses M1 = 11 kg, M2 = 8 kg, and M3 = 7 kg are placed on a rough, horizontal floor as shown. Two horizontal forces (Ff = 25 N and Fb = 155 N) are applied to blocks M1 and M3 so that the blocks accelerate. The coefficient of kinetic friction between the floor and the blocks is ?_k = 0.45. What is the magnitude of acceleration of block M2? _____ m/s^2
Added by Aaron R.
Close
Step 1
The total force is the sum of the forces Ff and Fb, and the total mass is the sum of the masses M1, M2, and M3. Total Force = Ff + Fb = 25 N + 155 N = 180 N Total Mass = M1 + M2 + M3 = 11 kg + 8 kg + 7 kg = 26 kg Show more…
Show all steps
Your feedback will help us improve your experience
Ivan Kochetkov and 73 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Consider a force of 57.3 N, pulling 3 blocks of identical masses, where each mass is 0.8 kg, along a rough horizontal surface. The coefficient of kinetic friction between the blocks and the surface is given by 0.4. The acceleration of the blocks is a. The acceleration of gravity is 9.8 m/s². Find the acceleration a. Answer in units of m/s². 001 (part 1 of 2) 25.0 points Consider a force of 57.3 N, pulling 3 blocks of masses, where each mass is 0.8 kg; identical horizontal surface. The coefficient of kinetic friction between the blocks and the surface is given by 0.4. The acceleration of the blocks is a. The acceleration of gravity is 9.8 m/s². Find the acceleration a. Answer in units of m/s². 002 (part 2 of 2) 10.0 points The tension of the strings are T₁ and T₂ (see sketch). The equation of motion of m₂ is given by
Vishal G.
A horizontal forec $F$ aets on a block of mass $m_{1}$, which is placed on a block of mass $m_{2}, m_{2}$ is placed on another block of mass $m_{3}$ which is placed on a smooth horizontal floor. I.ct us now pull the blocks with the forces of magnitudes $18 \mathrm{~N}, 100 \mathrm{~N}$ and $15 \mathrm{~N}$ as shown in the figurc. If the coc[licients of static and kinetic friction betwoen all contact surlaces are $\mu_{x}=0.3$ and $\mu_{k}=0.2$ respeetively, find the (a) friction at each surface, (b) acceleration of the blocks. \Lambdassume, $m_{1}=m_{2}=m_{3}=10 \mathrm{~kg}$
Laws of Motion and Friction
Section F
Consider two blocks that are resting on top of each other: The lower block has mass m2 4.8 kg and is resting on frictionless table. The upper block has mass m1 2.2 kg. Suppose the coefficient of static friction between the two blocks is given by μs 0.50. A force of magnitude F is applied as shown for which it is the maximum pushing force applied horizontally to the upper block so that the two blocks move together without slipping: Draw the free body diagram of the two blocks. What is the friction force between the two blocks? (Ans: 10.79 N) What is the acceleration of these two blocks? (Ans: 2.25 m/s²) What is the maximum pushing force, F (Ans: 15.74 N)
Mark J.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Watch the video solution with this free unlock.
EMAIL
PASSWORD