What is the first law of motion?
Object in motion will continue to move in the same direction and speed unless forces act on it. (Inertia 惯性)
What is force?
Push or pull
What is this type of motion?
straight line
Give an example of friction
...
Wha is this type of motion?
Round and round
How force affects motion?
Force can change shape
What is this type of motion?
Zigzag
When two surfaces rub against each other we call it
Friction
How force affects motion?
Force can change speed
The place where an object is
Position
What is this type of motion?
Up and down
Which body has more gravity, that has more mass or less mass?
More mass
Is this push or pull?
Push
How force affects motion?
Force can change direction
How many laws of motion Newton has discovered?
3 Laws of motion
Who discovered gravity
Isaac Newton
What is this type of motion?
Back and forth
What is gravity?
Force that pulls things down (to the ground)
Is this push or pull?
Pull