20. A 5 kg block is pulled along a rough level surface by a pull force P, where P = 300 N. The figure shows the free-body diagram for the block, fk represents the force of kinetic friction. If the coefficient of kinetic friction between the block and the surface, k = 0.3, calculate the magnitude of the block's acceleration? Hint: Obtain two equations from Newton's second law, only one of them directly involve acceleration but you will still need the other equation. FN fko.? 3 5kg mg 300N olay ontos antiga P ΣFx = max= P_-4₁₂² = Max {Fy=may = FN-pg = mal FN-g=a el or sups P-MR₂ = m (FN Мк
20. A 5 kg block is pulled along a rough level surface by a pull force P, where P = 300 N. The figure shows the free-body diagram for the block, fk represents the force of kinetic friction. If the coefficient of kinetic friction between the block and the surface, k = 0.3, calculate the magnitude of the block's acceleration? Hint: Obtain two equations from Newton's second law, only one of them directly involve acceleration but you will still need the other equation. FN fko.? 3 5kg mg 300N olay ontos antiga P ΣFx = max= P_-4₁₂² = Max {Fy=may = FN-pg = mal FN-g=a el or sups P-MR₂ = m (FN Мк
College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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![**Physics Problem: Block on a Rough Surface**
**Problem Statement:**
A 5 kg block is pulled along a rough, level surface by a force \( P \), where \( P = 300 \, \text{N} \). The figure illustrates the free-body diagram for the block. \( f_k \) represents the force of kinetic friction between the block and the surface, with a coefficient of friction \( \mu_k = 0.3 \). Calculate the magnitude of the block's acceleration.
**Hints:**
- Use two equations from Newton’s second law. Only one directly involves acceleration, but both are needed.
**Diagram Explanation:**
- A block labeled 5 kg is on a horizontal surface.
- \( f_k = 0.3 \) denotes the force of kinetic friction opposing the motion.
- \( P = 300 \, \text{N} \) is the horizontal force pulling the block.
- \( F_N \) is the normal force acting perpendicular to the surface.
- \( mg \), the weight of the block, acts downward.
**Equations:**
1. Sum of forces in the x-direction:
\[
\Sigma F_x = ma_x = P - \mu_k F_N
\]
2. Sum of forces in the y-direction (equilibrium, no vertical acceleration):
\[
\Sigma F_y = 0 = F_N - mg
\]
**Solution Approach:**
- Use the second equation to solve for the normal force \( F_N \):
\[
F_N = mg
\]
- Plug \( F_N \) into the first equation to find the acceleration \( a \):
\[
P - \mu_k mg = ma
\]
**Options for Acceleration:**
- A) 25 m/s\(^2\)
- B) 57 m/s\(^2\)
- C) 285 m/s\(^2\)
- D) 315 m/s\(^2\)
- E) None of the above
Using this setup will guide you through solving for the acceleration of the block on this rough surface.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F38e39407-372d-4edd-bcc1-3a69e099571e%2F1ce64d32-9e65-403d-bbae-747b1aadd88b%2Foq39re_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Physics Problem: Block on a Rough Surface**
**Problem Statement:**
A 5 kg block is pulled along a rough, level surface by a force \( P \), where \( P = 300 \, \text{N} \). The figure illustrates the free-body diagram for the block. \( f_k \) represents the force of kinetic friction between the block and the surface, with a coefficient of friction \( \mu_k = 0.3 \). Calculate the magnitude of the block's acceleration.
**Hints:**
- Use two equations from Newton’s second law. Only one directly involves acceleration, but both are needed.
**Diagram Explanation:**
- A block labeled 5 kg is on a horizontal surface.
- \( f_k = 0.3 \) denotes the force of kinetic friction opposing the motion.
- \( P = 300 \, \text{N} \) is the horizontal force pulling the block.
- \( F_N \) is the normal force acting perpendicular to the surface.
- \( mg \), the weight of the block, acts downward.
**Equations:**
1. Sum of forces in the x-direction:
\[
\Sigma F_x = ma_x = P - \mu_k F_N
\]
2. Sum of forces in the y-direction (equilibrium, no vertical acceleration):
\[
\Sigma F_y = 0 = F_N - mg
\]
**Solution Approach:**
- Use the second equation to solve for the normal force \( F_N \):
\[
F_N = mg
\]
- Plug \( F_N \) into the first equation to find the acceleration \( a \):
\[
P - \mu_k mg = ma
\]
**Options for Acceleration:**
- A) 25 m/s\(^2\)
- B) 57 m/s\(^2\)
- C) 285 m/s\(^2\)
- D) 315 m/s\(^2\)
- E) None of the above
Using this setup will guide you through solving for the acceleration of the block on this rough surface.
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