Sci. 8- Mechanical Systems: Section 2.2 The Science of Work & 2.3 The Big Movers-Hydraulics
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Last updated almost 5 years ago
9 questions
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Question 1
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
6.
What is a pascal? What does it measure? (pg. 294)
Question 7
7.
How do the sizes of the pistons affect the pressure in a hydraulic system? (pg. 295 & 298)
Question 8
8.
Describe how forces are transferred in a fluid. (pg. 298)
Question 9
9.
Calculate the pressure on the fluid in a hydraulic jack that has a piston area of 16cm2 and to which you apply a force of 400 N. Use the formula: p = F/A
Example:
Be mindful of your units in your answer.
The scientific definition of work is ... “Work is done when a force acts on an object to make
the object move.” Which statement below describes work being done.
Hank worked very hard to get all his homework done.
Doing math is hard work if you don’t like numbers.
It was hard work for Sam to move the desk two meters.
It was hard work trying to move the car, but it wouldn’t budge.
Work is calculated using the formula W = F x d. If you lift a box onto your desk that is 0.4 meters off the floor, using 50 Newtons of force, how much work are you doing?
20 Joules
125 Joules
50.4 Joules
49.6 Joules
In a car, what provides the force (energy source) that makes work (the car moving) possible?
engine
transmission
gasoline
wheels
Using a machine does not mean that less work is done. This is because ...
Work input is never equal to work output
Work input is equal to work output
Less force means less distance
More force means more distance
When determining the efficiency of a certain machine, the students found that 1600J of work were needed to get 1200J of work from the machine. The efficiency of this machine was ...
