ENGINEERING MECHANICS

ELEMENTSENGINEERING MECHANICS11.A freely falling body is a body in rectilinear motion and with constant ________. (ECE Board November 2001).a.Velocityb.Speedc.Decelerationd.Acceleration

2 2.When the total kinetic energy of a system is the same as before and after the collision of two bodies, it is called: (ECE Board November 2001).a.Static collisionb.Elastic collisionc.Inelastic collisiond.Plastic collision

33.The periodic oscillations either up or down or back and forth motion in a straight line is known as _________. (ECE Board April 2001).a.Transverse harmonic motionb.Resonancec.Rotational harmonic motiond.Translational harmonic motion44.Impulse causes _________. (ECE Board November 2000).a.The objects momentum to changeb.The objects momentum to decreasec.The objects momentum to increased.The objects momentum to remain constant or to be conserve5 5.The study of motion without reference to the force that causes the motion known as ______. (ECE Board November 2000).a.Staticsb.Dynamicsc.Kineticsd.Kinematics

6a 6.Momentum is properly related to the objects _____. (ECE Board April 2000).a.Motion and massb.Mass and accelerationc.Motion and weightd.Weight and velocity

7 7.A vector quantity that describes both how fast it it is moving and the direction in which it is headed.a.Accelerationb.Motionc.Lineard.Velocity8 8.g = 32.2 ft/sec2. How is it expressed in SI? (ECE Board October 2000).a.9.81 m/sec2b.9.86 m/sec2c.9.06 m/sec2d.9.91 m/sec2

9 9.The path of a projectile is a: (ME Board October 2000).a.Ellipseb.Parabolac.Part of a circled.Hyperbola

10 10.What is the name for a vector that represent the sum of two vectors? (ME Board October 2000).a.Momentb.Torquec.Scalard.Resultant11 11.A diagram which shows only the forces acting on the body. (ME Board October 2000).a.Free body diagramb.Cash flowc.Forces flow diagramd.Motion diagram12 12.What is the equivalent of one horsepower? (ME Board October 2001).a.746 Wb.3141 kWc.33,000 ft-lb/mind.2545 Btu/lb

13 13.Resistance to motion, caused by one surface rubbing against another. (ME Board April 2002).a.Inertiab.Resistancec.Gravityd.Friction

14 14.Why should a person weigh less on the moon than on the earth? (ME Board April 2002).a.The force of earths gravity is greater than that of the moon.b.The mass of the moon is smaller than the mass of the earth.c.The moon is only a satellite of the earth.d.None of the above.

15 15.What causes space capsules to become hot when they re-enter the earths atmosphere? (ME Board April 2002).a.The firing of its rocket engineb.Earth atmosphere is hotc.The friction of the aird.All of these

16 16.At what angle does a projectile go farthest when fired? (ME Board April 2002).a.30 degb.45 degc.60 degd.75 deg

17 17.Jun is standing on a weighing scale attached to the floor of an elevator which reads zero. What does this indicate? (ME Board April 2002).a.Jun is still acceleratingb.Jun is moving at constant speedc.Jun is at restd.Jun is freely falling 18 18.The impulse and momentum principle is mostly useful for solving problem involving:a.Velocity, acceleration, and timeb.Force, velocity, and timec.Force, acceleration, and timed.Force, velocity, and acceleration

19 19.One joule of work is done by a force of Newton acting through a distance of:a.One meterb.One inchc.A footd.One cm 20 20.Momentum = Force x ________.a.Velocity2b.Velocityc. velocityd.Time

21 21.The first derivative of kinetic energy with respect to time is:a.Powerb.Workc.Momentumd.Force

22 22.Points that lie in the same plane:a.Coplanarb.Parallelc.Obliqued.Collinear23 23.The study of motion without reference to the forces which causes motion is known:a.Kineticsb.Accelerationc.Kinematicsd.Motion

24 24.What is the branch of mechanic which deals with bodies in motion?a.Kinematicsb.Dynamicsc.Staticsd.Kinetics

25 25.Work for energy can be a function of all of the following EXCEPT:a.Force and distanceb.Force and timec.Power and timed.Torque and angular motion 26 end27