1. 2.1/4 points | Previous Answers SerCP11 4.P019 My Notes Ask Your Teacher Calc

Question

1. 2.1/4 points | Previous Answers SerCP11 4.P019 My Notes Ask Your Teacher Calculate the magnitude of the normal force on a 10.2 kg block in the following circumstances. (Enter your answers in N.) HINT (a) The block is resting on a level surface. 99.96 The four cases in this problem are the most common situations. In general, solving for the normal force involves drawing a free-body diagram and applying Newton's second law. N (b) The block is resting on a surface tilted up at a 25.8° angle with respect to the horizontal 89.99 (c) The block is resting on the floor of an elevator that is accelerating upward at 4.28 m/s2. 43.656 (d) The block is on a level surface and a force of 145 N is exerted on it at an angle of 25.8° above the horizontal 163.07 Need Help? Read ItWatch It

Explanation / Answer

C) reaction force= m(g+a)= 10.2*(9.8+4 28)= 143.616 N

D) reaction force= 99.96 - 145sin 25.8= 36.85 N

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