Show the arrow of the Weight and Buoyant force on the object. 画出箭头显示物体的重力和浮力位置。
Weight: Arrow DOWN; Buoyant force: Arrow UP
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25
What are the factors affecting pressure? 什么因素会影响压力
Surface area and force
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thief
Give points!
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25
magnet
Take 15 points!
Okay!
gift
Win 20 points!
Okay!
banana
Go to last place!
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25
How do we measure force? By using a.......... 我们如何测量力的存在?使用......
Spring balance (by reading the scale on the balance)
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25
Name the CLASS OF LEVER for Stapler and Hole Puncher. 订书机和打洞机属于哪种杠杆类?
Second Class Lever
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25
State a type of force acting on a duck. 鸭子施加的一种力是........
Buoyant force
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25
Why is the duck is able to walk smoothly instead of the chicken? 为什么鸭子比鸡步行快步?
The size of the duck's legs is larger than the chicken. The pressure produced lower than the chicken.
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25
State THREE daily activities which involved PUSH and PULL force 列举出三个在日常生活中有涉及推和拉力的动作
Opening a door, Pressing a switch, Opening a can food, Opening a car door, Opening a drawer
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25
What is the type of force when an object is in contact with a surface?当一个物体碰触在一个表面上时,产生了什么力?
Normal force
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boom
Lose 50 points!
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rocket
Go to first place!
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shark
Other team loses 15 points!
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thief
Give points!
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How do we clean the house area by removing all the dust? By using.....我们如何清理家里的尘埃?
Vacuum cleaner
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25
First Class Lever (State the position of the Effort, Fulcrum and Load) 第一类杠杆(说明力点,支点和重点的位置)
Fulcrum is between load and effort
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25
The dam wall is (thinner, thicker) at the bottom compared to the above part because the water pressure effect on the base of the dam is (lower, higher). 水坝的水压
thicker, higher
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25
(Ice tong, nut-cracker, paper cutter, scissors) Which is classified into the third class lever?
Ice tong
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banana
Go to last place!
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rocket
Go to first place!
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rocket
Go to first place!
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baam
Lose 20 points!
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25
Name the CLASS OF LEVER for Hoe and Fork. 锄头和叉子属于哪种杠杆类?