Please tell Q7 its of class 9 and of newton's law.
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1st Law states that an object will continue without a change in motion (constant velocity) if there are no outside forces.
2nd Law states that to have an acceleration, there must be an outside force.
∑F=m⋅a
If F = 0,
∑F=m⋅a
becomes 0=m⋅a
0=a
And if there is no acceleration, there is no change in motion (1st law).
2nd Law states that to have an acceleration, there must be an outside force.
∑F=m⋅a
If F = 0,
∑F=m⋅a
becomes 0=m⋅a
0=a
And if there is no acceleration, there is no change in motion (1st law).
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