Ch7_AMEC 6006 - APPLICATION OF BASIC MECHANICS (CHP 7) DECK (11) 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
