牛顿第三定律：作用力与反作用力
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Objective
我可以解释牛顿第三定律，并举例说明作用力与反作用力。
Part 1 of 4
Warm-up video
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Part 2 of 4
Key concepts
3 concepts
- 1
Newton's third law states that when object A puts a force on object B, object B puts an equal and opposite force back on object A.
- 2
The acceleration of an object depends not only on the force acting on it but also on its mass, as described by Newton's second law.
- 3
The equal and opposite forces described by Newton's third law always act on different objects, which means they cannot cancel each other out.
Part 3 of 4
Practice
3 questions
根据牛顿第三定律，当一个物体对另一个物体施加力时，会发生什么？
解释为什么作用力和反作用力不会相互抵消。
Part 4 of 4
Exit ticket
Quick comprehension check
“请解释牛顿第三定律，并举一个作用力与反作用力的例子。务必明确指出两个物体分别受到的力。”
Sample answer included in the free materials
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