What is the difference between potential energy and kinetic energy?
Potential energy is stored and available to be used later on.
Kinetic energy have a motion can move, like bicycleWhat is the difference between potential energy and kinetic energy?
100
What is Pressure?And how is pressure calculated?
Pressure is force acting in a certain area. P=Force/Area
100
There are 84 teeth on the driving gear, and 12 teeth on the driven gear, what is the speed ratio?is this a speed advantage or a force advantage?
The speed ratio is 7, and is speed advantage!
100
What device use hydraulic system?(vary)
oil pipeline...
200
What is work? and how is work calculated?
Work is energy in action. work=F*D
200
What is efficiency? What is the formula for calculating the efficiency?
The efficiency is the ratio of the useful work or energy provided by a machine or system with the actual work or energy supplied to the machine or system.
Efficiency=Work load/Work effort
200
What is Pascal's law?
A law is stating that when pressure is exerted on on part of fluid, the same pressure is transmitted unchanged to all parts of the fluid, no matter what the shape of the container holding the fluid
Hydraulic system is using the force of a liquid in a confine space.
Pneumatic system does not seal gas usually air in a mechanical system in the same way that hydraulic system machines seal in hydraulic fluid.
300
What is the difference between class 1 leaver, class 2 lever and lass 3 lever?
class 1 lever-fulcrum in the middle, effort and load on any side of the lever
class 2 lever- fulcrum, load, effort
class 3 lever-fulcrum, effort, load
300
Efficiency can be increased by reducing frictional force. A sport that tries to reduce frictional
force by sweeping the ice in front of the rock is ...
Cycling
300
To calculate pressure the formula used is P = F / A. Units of pressure are ...
Pascal
300
A cherry picker uses hydraulics to raise a working platform. 10N of force are applied to the
small piston in the hydraulic system to raise a load of 50N (on the large piston) a distance of
0.5m. How far would the small piston have to be pushed to accomplish this task?
2.5m
300
is The jackhammer is an example of a pneumatic device that is used to do work
Yes
400
What is mechanical advantage and how is mechanical advantage calculated(2 different ways)
Mechanical advantage is the comparison of the force produced by the machine to the force applied to the machine.
MA=DE/DL
MA=FL/FE
400
When a skater moves across an ice surface, a thin layer of water is created, allowing the skate
blade to slide across the surface with little friction. This layer of water is produced by the
pressure of the ....
Zamboni
400
To increase the force on the output piston , what should
the input piston do?
must move through a greater distance.
400
The heel of a stiletto shoe can exert a lot of pressure. If the area of the heel is 0.5cm2 and a
force of 200N is exerted using the heel, what is the pressure exerted by the heel?
400Pa
400
Hovercrafts are used by the Canadian Coast Guard in search and rescue
missions. They are also used commercially, to transport people, cars and
equipment over long distances on land or water. The hovercraft has a pump that
draws air from outside and pumps it out through small holes in the bottom of the
hovercraft. A skirt around the bottom holds enough air to support the weight of
the craft above the water or land. Propellers on the back of the craft drive the
hovercraft forward, and rudders are used to steer it.
(T or F?)
True
500
What is ergonomic?
The science of designing machines to suit people.
500
he process which transfers energy or power from one place to another is ' energy ...
1.conversion
2.transformation
3.transmission
4.convection
2 or 3....
500
is the amusement park using the hydraulic system?
Yes
500
A pulley system lifts a 100N load with a force of
20N. The input distance is 3m and the output distance is 0.5m. The efficiency of this pulley
system is ...
83.3%
500
Life depends on a pneumatic system in your body – namely the circulatory system.(T or F)