Systems In Action
By Mr. McLeod & Mr. F.
1. Forces can be categorized into two different groups. They are:
friction and contact forces
contact and action-at-a-distance forces
weight and mass
friction and action-at-a-distance forces
2. Gravity could best be categorized as
an action-at-a-distance force
a contact force
a friction force
a mass force
3. The force of friction is best described as
a magnetic force
a force that opposes the motion of an object
a pulling force
4. Use this graph to answer questions 4 & 5.
Which of the following is the correct statement regarding Planet C?
An astronaut on Planet C would weigh more than on Earth.
An astronaut on Planet C would weigh less than on Earth.
The mass of an astronaut on Planet C is greater than on Earth.
The gravitational field on Planet C is less than Planet A.
5. Which of the following is the correct statement regarding the three planets?
The gravitational field on Planet A is greater than on Planet C.
The mass of Earth is greater than Planet A.
The gravitational field on Earth is greater than Planet A.
The gravitational field on Earth is greater than Planet C.
6. Which of the following forces transforms kinetic energy into thermal energy?
7. What is the amount of work done by a motorcycle engine if it exerts a force of 1000 N to move the bike a distance of 50 m?
50 000 J
5 000 J
8. A nutcracker is a mechanical device that makes work easier by
decreasing the output force
increasing the output force
increasing the distance over which the force is applied
changing the direction of the applied force
9. A ramp is a mechanical device that makes work easier by
decreasing the input force
increasing the input force
decreasing the distance over which the force is applied
changing the direction of the force
10. Which of the following statements about a first-class lever is true?
The output force is in the opposite direction of the input force.
The ideal mechanical advantage is always greater than 1.
The ideal mechanical advantage is always less than 1.
The output force is in the same direction as the input force.
11. A pulley with three support ropes has an ideal mechanical advantage of
12. A wheelbarrow is an example of which two simple machines?
a first-class lever and a pulley
a second-class lever and a wheel and axle
a third-class lever and a ramp
a third-class lever and a wheel and axle
13. Which of the following statements regarding a ramp is true?
The ideal mechanical advantage of a ramp is always less than 1.
The input force is always greater than the output force.
It is not a type of simple machine.
The input force is always less than the output force.
14. The following will best increase efficiency:
15. The screw is most similar to which other simple machine?
a second-class lever
a wheel and axle
16. Which of the following statements is true regarding mechanical advantage (MA) and ideal mechanical advantage (IMA)?
For any machine, its mechanical advantage (MA) will always be greater than its ideal mechanical advantage (IMA).
For any machine, its mechanical advantage (MA) will always be less than its ideal mechanical advantage (IMA).
The ideal mechanical advantage (IMA) is determined using the formula IMA=F in/F out.
The ideal mechanical advantage (IMA) is determined using the formula IMA= F out/ F in.
17. Ancient Egyptians built the pyramids using simple machines. Which simple machines are being employed in the picture?
ramp and pulley
wedge and wheel and axle
wheel and axle and a ramp
lever and ramp
18. In a school system, the organizational component is:
19. The consumer in a school system is
20. For what reason are most non-mechanical systems created?
to create jobs in the society
to meet a need or solve a problem
to create businesses and organizations
to create mechanical systems
21. Which of these components of a library system could be classified as information and support?
the person who borrows a library book
the automated checkout system
the organization of the books in the library
22. What is the main reason automated components are used in non-mechanical systems?
Automated components make the system more efficient.
Automated components cost less.
Automated components do not need to be replaced.
Human workers are not as versatile.
23. The use of automated systems usually involves the loss of jobs. This would have the greatest impact on
24. Which of the following statements is a quantitative observation?
A car has passenger-side air bags.
A car consumes 8.2 L of gas per 100 km.
A car emits few pollutants.
Farmer Brown loves Fords.
25. Which of the statements is a qualitative observation?
The car has passenger side airbags.
The car consumes 8.2 L of gas for every 100 km.
The car costs $23 000.
26. What is a disadvantage of mass production?
Items are made faster.
Items are often of lower quality.
Items are made for less cost.
Productivity is increased.
27. The following are three statements used to describe work.
I. Work is done only if an object moves through a distance.
II. Work is done only if energy is transferred from one form to another.
III. Work is done only if a force is applied.
I and II only
II and III only
I, II, and III
28. The metric unit for force is
29. Scissors are an example of which two machines?
ramp and first-class lever
wedge and first-class lever
ramp and wheel and axle
30. Mechanical advantage is best described as:
the ability to do work.
the ratio of output force to input force.
a force that opposes the motion of an object.
the force of gravity.
31. Kinetic energy is:
action at a distance force.
force x distance.
energy of a moving object.
the amount of matter in an object.
32. Efficiency is best described as:
the mechanical advantage of a machine without friction
work a machine is designed to perform
the ratio of useful output work to input work
grooved wheel with a rope looped around it
33. The teeter-totter is an example of:
second class lever
wheel and axle
first class lever