Calculating Friction & Coefficient: 0.50 kg Block on 30° Ramp

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SUMMARY

The discussion focuses on calculating the force of friction and the coefficient of friction for a 0.50 kg block sliding down a 30° ramp with an acceleration of 2.0 m/s². The net force acting on the block is derived using the equation f=ma, leading to the calculation of the gravitational components along the ramp. The frictional force is determined by subtracting the net force from the gravitational force, and the coefficient of friction is calculated using the relationship between frictional force and the normal force.

PREREQUISITES
  • Understanding of Newton's Second Law (f=ma)
  • Basic trigonometry for resolving forces (sine and cosine functions)
  • Knowledge of friction concepts (static and kinetic friction)
  • Familiarity with free body diagrams for analyzing forces
NEXT STEPS
  • Calculate the normal force on an inclined plane using trigonometric functions
  • Explore the relationship between mass, acceleration, and friction in dynamic systems
  • Study the effects of different angles of inclination on frictional forces
  • Learn about the implications of varying coefficients of friction in real-world applications
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Students studying physics, particularly those focusing on mechanics and dynamics, as well as educators looking for practical examples of friction and motion on inclined planes.

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Homework Statement



A block of mass 0.50 kg slides down a 30 degree ramp.

a) What force of friction opposes the motion of the block in order to make the acceleration equal to 2.0 m/s/s?

b) What coefficient of friction is necessary in order to accomplish this?

Homework Equations



f=ma

The Attempt at a Solution



net force=(9.8*.5)*sin30

2.45=.5(a)
a=4.9 m/s/s?
 
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Horizontal component of weight is mgsin(30) = 0.5mg
normal component = mgcos(30) = sqrt(3) * mg/2

0.5mg - F = ma

So F = 0.5mg - ma, we found F

Also F = mu * sqrt(3) * mg/2

mu = F/(sqrt(3) * mg/2)
 
Use F=ma to find the force needed. a is 2 and m is 0.5. Then break the black's force of gravity into components qith trig. Subtract the force from F=ma from the force going down the ramp to get frictional force. The difference between the forces must be from friction. Simply find the normal force and use F(friction)= F(normal)(coefficient of friction)
 

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