Tycho Brahe built the first what?
1 answer:
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Answer:
Net force due to all on the refrigerator is 400 N
Explanation:
As we know that two people are pushing the refrigerator while other two people are lifting the refrigerator
So net push force on the refrigerator is given as
Similarly net lift force on the refrigerator is given as
Now net force on the refrigerator is given as
Answer:
There is no mechanical advantage
Explanation:
The mechanical advantage is possible only when the force needed to lift a load is lesser than the weight of the load.
For example, is we have a mechanical advantage of 2, the force needed to lift will be 1/2 of the weight of the load, and if we have a mechanical advantage of 4, the force needed will be 1/4 of the weight of the load.
In the attached image there are clear examples of mechanical advantage with pulleys.
