AMEC 6006 - Application of Basic Mechanics (Chp 7) Flashcards
A turning moment is:
A) Change in position per unit time
B) Force times time
C) Directed change in position per unit time
D) Force that tends to cause a circular motion
E) Change in velocity per unit time
D) Force that tends to cause a circular motion
An object with a mass of 95 kg is at a height of 36 m above the ground. What is its potential energy?
A) 3.42 kJ B) 33.55 kJ C) 931.95 kJ D) 1.71 kJ E) 348.62 J
B) 33.55 kJ
Calculate the power required to pump 50 000 litres of water per minute to a vertical height of 72 m.
A) 360 kW B) 588.6 kW C) 69.44 kW D) 706.32 kW E) 49.05 kW
B) 588.6 kW
A dynamic body with a mass of 79kg is acted on by a force of 775N, what is its acceleration? (f=ma)
A) 0.102 m/s B) 9.81 s2/m C) 9.81 m/s2 D) 981 m/s2 E) 0.102 m/s2
C) 9.81 m/s2
The capacity of a body to do work is defined as:
A) Mass B) Force C) Pressure D) Energy E) Power
D) Energy
A lever is used to move a load of 10 kN by applying an effort of 1000 N. What is the mechanical advantage of the lever?
A) 1000 B) 10 C) 1 D) 100 E) 10000
B) 10
A body with a mass of 88 kg is moving at a velocity of 13.89 m/s. What is its kinetic energy?
A) 1.22 kJ B) 611.11 J C) 6.9 kJ D) 13.89 kJ E) 8489 J
E) 8489 J
Any action on a body which tends to change its size, shape or its state of motion is defined as:
A) Volume B) Acceleration C) Displacement D) Force E) Mass
D) Force
Rate of doing work is defined as:
A) Power B) Potential energy C) Kinetic energy D) Any energy E) Work
A) Power
Force acting in a direction at right angles to a surface, divided by the surface area, is defined as:
A) Pressure B) Friction C) Acceleration D) Surface area E) Weight
A) Pressure
The ratio of the load to the effort is called:
A) Power B) Actual mechanical advantage C) Efficiency D) Velocity ratio E) Work
B) Actual mechanical advantage
