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Example Questions
Example Question #1 :Ged Science
Which of the following best illustrates Newton's Second Law?
Possible Answers:
As a hammer hits a nail, the nail also exerts a force on the hammer
If an object is not accelerating, then the net force on it is zero
当两个钹碰撞,一些动能是converted into sound
A ball is rolled across a table and does not stop until it hits an area with friction
Correct answer:
If an object is not accelerating, then the net force on it is zero
Explanation:
牛顿第二定律是最好的表示为一个方程tion, in which the product of mass and acceleration is equal to net force:
By this principle, if there is zero acceleration, then the force must also be zero.
A non-zero acceleration must be present if there is a non-zero net force.
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