alleryA block slides down a rough incline of 30° with coefficient of kinetic friction 0.2 (g = 10 m s⁻²). Its acceleration down the incline is:
A3.3 m s⁻²
B1.7 m s⁻²
C5.0 m s⁻²
D2.7 m s⁻²
Answer & Solution
Correct answer: A. 3.3 m s⁻²
Down the incline a = g(sinθ − μk cosθ) = 10(0.5 − 0.2×0.866) = 10(0.5 − 0.173) = 3.3 m s⁻².
The value 5.0 wrongly ignores friction.
Keep practising Unit 2B: Friction, Gravitational and Normal Forces
Browse all Unit 2B: Friction, Gravitational and Normal Forces questions for AP Physics 1, or explore more Physics topics.
Related questions
As per your syllabus, when the origin of coordinates is chosen at the centre of mass, whatAs per your syllabus, a rigid body's general motion can be decomposed into which two kindsAs per your syllabus, the CM of a continuous distribution is given by which integral?As per your syllabus, if F_ext on the system is zero, the total linear momentum of the sysAs per your syllabus, the total LINEAR MOMENTUM of a system of particles equals which?As per your syllabus, eqn 6.11, the equation of motion of the centre of mass of a system oAs per your syllabus, the centre of mass of a UNIFORM (homogeneous) symmetric body lies atAs per your syllabus, the centre of mass of THREE equal masses placed at the vertices of a