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, The wheel of a car has a diameter of 16 inches and moves b.)4:1
a smaller wheel of 4 inches. What is the mechanical
advantage gained by the system?
a.)1:4
b.)4:1
c.)1:2
d.)2:1
A lever b.)Multiplies force and changes direction
a.)Reduces resistance
b.)Multiplies force and changes direction
c.)Transmits power from one object to another
d.)Cannot move in the reverse direction
Tension can best be called b.)A force
a.)A weight
b.)A force
c.)A movement
d.)A direction
Which of the following wedges generates the greatest a.)11" long and 4" high
amount of force.
a.)11" long and 4" high
b.)9" long and 4" high
c.)7" long and 4" high
d.)5" long and 4" high
You're trying to replace a flat. How much torque are you *Torque is calculated by multiplying force (in pounds) and length (in feet). Thus, 40
applying to a wheel nut if you're applying 40 pounds with a pounds multiplied by .75 feet gives us 30 ft-lb of torque.
wrench measuring 9"? 1 ft=12 in
a.)4 ft-lb Divide 9 in by 12 ft=.75ft
b.)30 ft-lb b.)30 ft-lb
c.)53 ft-lb
d.)360 ft-lb
Which of the following situations requires overcoming the c.)Pushing an empty refrigerator box down an icy path
least amount of kinetic friction?
a.)Pushing an empty refrigerator box down a path
b.)Pushing a refrigerator in its box down a path
c.)Pushing an empty refrigerator box down an icy path
d.)Pushing a refrigerator in its box down an icy path
What measures how much force is applied to an object in a.)Torque
order to rotate it?
a.)Torque
b.)Friction
c.)Pressure
d.)Vector
Which of the following is NOT a unit of power? d.)Newton
a.)Watt
b.)Horsepower
c.)Volt-ampere
d.)Newton
What is the potential energy of a 4 lb. book held 50 feet in *Potential energy is calculated by multiplying mass (in kilograms), acceleration due
the air? to gravity, and height (in meters). Thus, the potential energy of the book is 268.128
a.)1,960 J J: 1.8 kilograms multiplied by 15.2 meters multiplied by 9.8 m/s2.
b.)268 J
c.)200 J b.)268 J
d.)27 J
When a machine compounds the force you use, it gives a.)Mechanical advantage
you a(n)
a.)Mechanical advantage
b.)Output advantage
c.)Mechanical leverage
d.)Output leverage