Q9. Mass moment of inertia of a body is always_ (A) zero (B) a negative quantity (C) a positive quantity (D) None of the above Q10. To spin faster, a skater can develop a large amount of angular momentum by (A) extending her arm (B) drawing in her arm (C) flapping her arm (D) doing nothing Q11. Eccentric impact occurs when the line connecting the mass centers of the two bodies with the line of impact. (A) coincide (B) does not coincide (C) is parallel (D) is perpendicular

Q9. Mass moment of inertia of a body is always_ (A) zero (B) a negative quantity (C) a positive quantity (D) None of the above Q10. To spin faster, a skater can develop a large amount of angular momentum by (A) extending her arm (B) drawing in her arm (C) flapping her arm (D) doing nothing Q11. Eccentric impact occurs when the line connecting the mass centers of the two bodies with the line of impact. (A) coincide (B) does not coincide (C) is parallel (D) is perpendicular

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A pulley 1 m in diameter rotating at 300 r.p.m is brought to rest in 80 s. By constant force of friction on its shft. How many revolutions does it moves?
A block of mass M = 539.0 g sits on a horizontal tabletop. The coefficients of static and kinetic friction are 0.549 and 0.391, respectively, at the contact surface between table and block. The block is pushed on with a 13.6 N external force at an angle \theta with the horizontal. a) What angle with respect to the horizontal will lead to the maximum acceleration in horizontal direction of the block for a given pushing force? (Give your answer in degrees and use the unit "deg") b) What is the value of this maximum horizontal acceleration?
A cart (20 kg) is supported by 2 wheels (15 kg each) on a 30 degree incline. The wheels have a radius of 100mm and roll without slipping. WHAT IS THE ACCELERATION OF THE CART AFTER ITS RELEASED FROM REST?
Consider the system shown below. Block A weighs 95.0N and block B weighs 55.0N. Once block B is set to downward motion, it descends at a constant speed. A) Calculate the coefficient of kinetic friction between block A and the tabletop. B) A dog, also of weight 95.0N, Falls asleep on top of block A. If block B is now set into downward motion, what is its acceleration (magnitude and direction)?
(b) An electric motor lifts a mass of 500 kg from the ground to a height of 30 m in 1.5 minutes. Calculate the motor's output power during operation. The gravitational acceleration, g, is 9.81 m. s-².
Q2/A pulley used to transmit power by means of ropes has a diameter of 3.6 metres and has 15 grooves of 45° angle. The angle of contact is 170° and the coefficient of friction between the ropes and the groove sides is 0.28. The maximum possible tension in the ropes is 960 N and the mass of the rope is 1.5 kg per metre length. What is the speed of pulley in r.p.m. and the power transmitted if the condition of maximum power prevail ?
1. A massless spring (k=400) is pulled by 25cm from its natural length and then released,the spring is attached to a 0.40kg block and oscillates across a horizontal frictionlesssurface. Calculatea. Max velocityb. Max accelerationc. Velocity, restoring force and acceleration at 20 cm from its natural length.
A person is pushing two boxes placed side by side with each other. What is the acceleration caused by the applied force if the net force is 253.22, the coefficient of kinetic friction of the boxes is 0.74 and the sum of the mass of the boxes is 91.05kg? Is it possible to have one of the boxes generate an applied force of 144.34N, if yes, what is the mass of the other box?
weighs 60 N on Earth. (3). A system consists of a pulley (vertical wheel) that is only allowed to rotate (spin). A cord is passed over the pulley and at each end there is a mass attached to the end of the cord. The mass attached on the left is m, =0.6 kg and at the right the mass is m2 = 0.8 kg. a) Calculate both the Tension in the cord and the acceleration of the system. b) What are the accelerations of both masses, if you were to cut the cord? Neglect the friction between cord and wheel,
An object, m1 with a mass of 10.0 kg placed on a frictionless, horizontal table. It is connected to a string that passes over a pulley and then is fastened to a hanging object, m2 with a mass of 14.0 kg. a. The tension in the string is? b. Find the magnitude of the acceleration of the objects
A 5-kg block is acted on a 30-N tensile force that acts 50° from the horizontal. The kinetic coefficient of friction is 0.25. What is the acceleration of the block?
A 60 kgm body has a potential energy if 135 Kcal with respect to a datum plane X and a potential energy of 99 Kcal with respect to a datum planebY. If the local acceleration of gravity is standard, compute the relative position of the plane X relative to plane Y. Reaolve the problem if g=30 fps^2.