4. If a block slides without friction down a fixed, inclined plane with ? = 40° as shown in Figure 1. 4.1 What is the block's acceleration in Figure 1? (3) 4.2 If block is now considered to experience the static friction between the block and plane with the coefficient of 0.5, at what angle will the block start sliding if is initially at rest? (5) 4.3 As the block begins to slide, there is a kinetic friction between the block and the surface (?k = 0.3). Find the acceleration for the angle ? = 30° (5)
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The block's acceleration in Figure 1 can be calculated using the formula a = g * sin(θ), where g is the acceleration due to gravity (9.8 m/s^2) and θ is the angle of the incline. So, a = 9.8 * sin(40) = 6.3 m/s^2. Show more…
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