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Subzero

Questions (8)

What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?60%*** 24% 32% 80%
1. 4 answers
2. 968 views
A certain lever system is only 30% efficient. What could make it more efficient?Make a longer lever that will require less
1. 4 answers
2. 1,501 views
How does a pulley make work easier when it is used to lift an object?It reduces the weight of the object being lifted. It
1. 4 answers
2. 1,099 views
Which machine has the highest efficiency?machine/ output work (j)/ input work (j) A 750 1,500 B 1,000 4,000 C 450 600 D 3,000
1. 4 answers
2. 983 views
In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)a car that traveled 80
1. 3 answers
2. 993 views
Where is the fulcrum in this situation?(guy lifting a rock with a bar) It is the point where the bar touches the smaller rock.
1. 4 answers
2. 824 views
A person is lifting a heavy box using a lever. What is the purpose of the lever in this situation?
1. 4 answers
2. 1,218 views
How do simple machines make work easier?
1. 1 answer
2. 528 views