ENGG003 Midterm Exam Part 1

A couple is consists of

• Two like parallel forces of same magnitudes

• Two like parallel forces of different magnitudes

• Two unlike parallel forces of same magnitudes

• 243 kphTwo unlike parallel forces of different magnitudes

If the sum of all the forces acting on a body is zero, then the body may be in equilibrium provided the forces are

• Concurrent

• Parallel

• Like parallel

• Unlike parallel

900 N weight hangs on a vertical rope. A man pushes this weight horizontally until the rope makes and angle of 40° with the vertical. What is the tension in the rope?

• 917.13 N

• 834.64 N

• 1174.87 N

• 1285.69 N

A load of 100 lb is hung from the middle of a rope which is stretched between two rigid wall 30 ft. apart. Due to the load, the rope sags 4 ft. in the middle. Determine the tension in the rope.

• 149 lbs

• 165 lbs

• 173 lbs

• 194 lbs

Forces are called concurrent when their lines of actions meet in

• one point

• two points

• same plane

• different plane

Forces are called coplanar when tall of them acting on body lie in

• one point

• one plane

• different point

• different plane

Effect of a force on a body depends upon

• magnitude

• direction

• position or line of action

• all of the other choices

If a number of forces act simultaneously on a particle, it is possible

• not to replace them by a single force

• to replace them by a single force

• to replace them by a couple

• to replace them by a couple and a force

If two equal forces of magnitude P act at an angle 9° with the horizontal of Quadrant 1, their resultant will be

• P/2 cos 9/2

• IP sin 9/2

• 2P tan 9/2

• IP cos 9/2

The weight of a body is due to

• gravitational force of attraction towards the center of the earth

• gravitational pull exerted by the earth

• forces experienced by body in atmosphere

• centripetal force of earth