Class Management Help h 4 test-B Begin Date: 9 (17%) Problem 1: A book with mass
ID: 1659460 • Letter: C
Question
Class Management Help h 4 test-B Begin Date: 9 (17%) Problem 1: A book with mass m 2.25 kg rests on the top of a counter. The coefficient of static friction between the book and the counter is . 0.71 and the coefficient of kinetic friction is ,-0.24. ©theexpertta.com 25% Part (a) Write an expression for F the minimum force required to produce movement of the book on the top of the counter. 25% Part (b) Solve numerically for the magnitude of the force F," in Newtons. 25% Part (c) Write an expression fora, the book's acceleration, after it begins moving Assume the minimum fore, F continues to be 25% Part (d) Solve numerically for the acceleration, a in m/s2 Grade Summary Deductions 30% Potential 70% sinO cotan0 asin0acosO atan acotan sinh0 coshO tanhO cotanho Submissions Attempts remaining: 2 (30s per attempt) detailed vievw DegreesRadians Submit Hint I give up! Hints: 30% deduction per hint. Hints remaining: 2 Feedback:--, deduction per feedback.Explanation / Answer
a) From newton's second law
Fm - fs = m a
Fm - mus Fn = 0
Fm = mus * m * g
b) Fm = mus * m * g = 0.71 * 2.25 * 9.8
Fm = 15.66 N
c) a = (Fm - muk m g) / m
d) a = [ 15.66 - (0.24 *2.25 * 9.8 ) ] / 2.25
a = 4.61 m/s2