Work
Machines
Mechanical Advantage
Efficiency
More Work
100
for work to be done on an object, what must happen to the object
What is it must moves some distance as the result of the force?
100
a hinged door is an example of what type of lever?
what is a 2nd class lever
100
the ratio of output to input work forces of a machine
What is mechanical advantage?
100
the ratio of output work to input work of a machine.
What is efficiency?
100
I 210 J of work is done on a student being pushed in a chair, how far was the student pushed if he weighs 60 N and the chair weighs 10 N
What is 30 m?
200
the equation to calculate force.
What is W = F x d
200
a steering wheel is an example of this kind of simple machine
What is a wheel and axle
200
the equation to calculate mechanical advantage
What is output force/input force
200
the formula for calculating efficiency of a machine
What is (output work/input work) x 100
200
What is the force need to do 55 J of work to push an a box 10 m?
What is 5.5 N?
300
the units for work, a newton-meter
What is a Joule.
300
A machine that is a combination of two or more simple machines.
What is a compound machine?
300
What is the mechanical advantage of a ramp that is 2 m high and 6 m long?
What is 3
300
calculate the efficiency of a machine that does 200 J of work from an input of 500 J.
What is 40%.
300
What distance is an elephant on roller skates pushed if 6,000 J of work was done using 3,000 N of force?
What is 2 m?
400
A box is pushed across the floor 20 m using 15 N of force. What is the work done on the box?
What is 300 J
400
an axe is what kind of simple machine?
a wedge
400
What is the mechanical advantage of a machine that needs 15 N for force to output 300 N of force.
What is 20.
400
calculate the efficiency of a machine that does 1,000 J of work from an input of 1,200 J.
What is 83%.
400
What is the work done on an object that is moved 300 cm with 6.2 N of force?
What is 18.6 N?
500
Four students push the football sled 5 m using 1,000 N. What is the work done on the football sled.
What is 5,000 J.
500
the screw and wedge are modified types of this simple machine
What is an inclined plane?
500
How can you increase the mechanical advantage of a pulley?
What is increase the number of ropes supporting the pulley
500
What is the output work of a machine that is 75% efficient and has an input work of 180 J?
What is 135 J?
500
What is the work done on an object that moves 16 km with 500 N of force?
What is 8,000,000 J.
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