M2 Quiz#8:25 (Mechanic-Dynamics.B)

What is the ratio of load to effort called?

• Mechanical advantage.

• Velocity ratio.

• Mechanical ratio.

A gyro with a fixed point free to rotate in three axis but controlled by some external force.

• a tied gyro.

• a space gyro.

• an earth gyro.

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.

If a gyro is constrained to an external reference and has three degrees of freedom it is?

• a tied gyro.

• an earth gyro.

• a space gyro.

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.