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WorksheetsUnderstanding Simple Machines
Total questions: 12
Worksheet time: 9mins
What is the main function of a lever in a mechanical system? 杠杆在机械系统中的主要功能是什么？
To reduce friction
To change the direction of force
To increase the speed of movement
To lift or move heavy objects with less effort
Which of the following is an example of a compound machine? 以下哪项是复合机械的例子？
Pulley
Wheel and axle
Scissors
Inclined plane
How does a pulley make work easier? 滑轮如何使工作更容易？
By reducing the weight of the load
By changing the direction of the force applied
By increasing the speed of pulling
By using more energy
Which simple machine consists of a flat surface set at an angle? 哪种简单机械由设置成一定角度的平面组成？
Wedge
Screw
Inclined plane
Lever
What is a wedge mainly used for in simple machines? 楔子在简单机械中的主要用途是什么？
To cut or split objects
To lift objects vertically
To change the speed of rotation
To support weight
What happens when two gears of different sizes are combined in a system? 当两个不同尺寸的齿轮组合在一个系统中时，会发生什么？
The speed remains the same
The larger gear will turn faster
The smaller gear will turn faster
Both gears will stop turning
Which simple machine is an example of a circular lever? 哪种简单机械是圆形杠杆的例子？
Screw
Pulley
Wheel and axle
Inclined plane
What simple machines are combined to form a screw? 哪些简单机械组合形成了螺丝？
Lever and pulley
Inclined plane and wedge
Wheel and axle
Pulley and lever
Which simple machine would you use to lift a heavy load straight up? 你会使用哪种简单机械来垂直提升重物？
Wheel and axle
Pulley
Lever
Wedge
Why are compound machines more effective than simple machines? 为什么复合机械比简单机械更有效？
They use more electricity
They combine multiple simple machines to perform complex tasks
They are made of stronger materials
They require less effort to build
What is the main difference between a drive gear and a driven gear?
驱动齿轮和从动齿轮之间的主要区别是什么？
The drive gear is larger than the driven gear.
The drive gear is powered and transfers motion to the driven gear.
The driven gear rotates faster than the drive gear.
The driven gear controls the direction of movement of the drive gear.
What are 3 examples of DIFFERENT simple machines you can see in the workshop?
您在车间可以看到哪 3 种不同的简单机械的例子？(Hint, there are NO pulleys) （提示，没有滑轮）
