Final_practice

Final_practice - Final practice problems 8.1, 8.4, 8.5 4....

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Final practice problems 8.1, 8.4, 8.5 4. The displacement x(t) of a particle as a function of time t is shown in the graph below. (a) What is the average velocity during the following time intervals: 0 - 3 sec; 3 - 8 sec; 0 - 6 sec. (b) What is the instantaneous velocity at t = 1 sec, t = 3 sec and t = 8 sec. 5. A satellite of mass m moves in a circular orbit about the earth. The orbital radius is r and the orbital velocity is v. The earth mass is M e and the gravitational constant is G. (a) Find a relation between r and v by balancing the centripetal and gravitational forces. (b) Find the relation between the orbital T (time to travel once around the earth) and the orbital radius r. 6. Two masses of respectively 4 and 8 Kg are connected by a string which passes over a frictionless pulley (see figure). (a) What is the tension T in the rope? (b) What is the acceleration of either of the two masses? (c) If the two masses start from rest, how far do they travel during the first second
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Final_practice - Final practice problems 8.1, 8.4, 8.5 4....

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