AP Physics 1
2.7 Kinetic and Static Friction
2.5 Newton’s Second Law
2.2 Forces and Free-Body Diagrams
1.2 Displacement, Velocity, and Acceleration
Multi-Unit
An object of unknown mass is acted upon by multiple forces:
The coefficients of friction are \(\mu_s = 0.6\) and \(\mu_k = 0.2\). Starting from rest, the object travels \(10\,\text{m}\) in \(4.5\,\text{s}\). What is the mass of the unknown object?
- \(100\,\text{N}\) to the right at \(20^\circ\)
- \(400\,\text{N}\) to the left at \(40^\circ\) below the horizontal
- \(500\,\text{N}\) to the right at \(10^\circ\) below the horizontal
The coefficients of friction are \(\mu_s = 0.6\) and \(\mu_k = 0.2\). Starting from rest, the object travels \(10\,\text{m}\) in \(4.5\,\text{s}\). What is the mass of the unknown object?
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