M2 Quiz#7:20 (Mechanic-Dynamics.A)

What is the ratio of load to effort called?.

• Mechanical advantage

• Velocity ratio.

• Mechanical ratio.

The tension in the cable of a crane is 2500 N and it lifts a load through 50m, what is the work done on the load?.

• 125,000 J

• 500 J.

• 12.5 kJ.

1 Watt = ?

• 1kg/h

• 1 Joule/s

• 1 HP

 Ignoring friction, if you let an object slide down a slope, at the bottom.

•  the potential energy is equal to the kinetic energy.

• the potential energy is more than the kinetic energy.

• the kinetic energy is more than the potential energy.

1 HP = 33000 ft.lbs/min or 550 ft.lbs/s or?

• 736 Watts.

• 746 Watts.

• 1360 Watts.

The SI unit of Power is?

• Volt.

• Pascal

• Watt

A mass of 3kg weighs approximately?

• 0.675 N.

• 6.6 LB.

• 1.3 LB.

Power is the rate of doing work. It is measured in?

• Watts/Seconds.

• Joules/Seconds.

• Joules * Seconds.

A mass of 2kg weighs approximately.

• 0.675 N.

• 6.6 LB.

• 4.4 LB.

A 6000 kg engine is lifted off a wing to a height 0.5 metres and then pushed across the hangar 24 meters. The force required to push the trolley is 12 kN. What is the work done to move the trolley?.

• 298kJ.

• 84MJ.

• 288kJ.