MECHANICS OF MACHINES

A truck driver is trying to push a loaded truck with an applied force. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?

• Fd
• –Fd
• F/d
• Zero

If the distance moved by the effort is given by (y) and the distance moved by the load is goven by (x) velocity ratio is given by

• x/y
• x+y
• x-y
• y/x

In ideal machine the relation between the output of machine and the input of machine is _______________

• Zero
• Positive
• Equal
• Negative

In the image given below A nd B represents to

• A - Output of the machine,B - Input of the machine
• A - Mechanical advantage,B - Velocity ration
• A - Input of the machine,B - Output of the machine
• A - Velocity ratio,B - Mechanical Advantage

In a lifting machine, an effort of 500 N is to be moved by a distance of 20 mto raise a load of 10,000 N by a distance of 0.8 m. Determine the velocity ratioand mechanical advantage.

• 10 and 35
• 20 and 35
• 25 and 20
• 10 and 25

A push or a pull that can move an object is a __________.

• gear
• lever
• force
• machine

A ___________ is a device by means of which work can be performed easily or in a convenient manner.

• Machine
• Human Hand
• Power
• Man

You push a food tray 1.5 m along a cafeteria table with a constant force of 18 N. How much work do you do?

• 12 Nm
• 27 Nm
• 19.5 Nm
• 16.5 Nm

Which of the following statements is true for Figure

• B – is the fulcrum, C- is the resistance, A – is the effort
• B – is the resistance, C – is the fulcrum, A – is the effort
• B – is the fulcrum, A – is the effort, C- is the resistance
• B – is the resistance, A – is the fulcrum, C – is the effort

These two parts act as one simple machine. They roll and are found on cars, bikes and wheelbarrows.

• Screw
• Wheel and Axle
• Lever
• Inclined Plane