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6. Intro to Forces (Dynamics)

Newton's First & Second Laws

6. Intro to Forces (Dynamics)

Newton's First & Second Laws

Multiple Choice
When you drive on icy roads, which of the following physical quantities is most directly affected, according to Newton's First and Second Laws?
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Multiple Choice
Which of the following best describes Newton's First Law of Motion?
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Multiple Choice
According to Newton's Second Law, if an unbalanced force acts on an object, what will happen to the object's motion?
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Multiple Choice
In Newton's Second Law, acceleration is given by $a = \frac{F}{m}$ . On which two variables does acceleration depend?
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Multiple Choice
According to the second part of Newton's First Law, what happens to an object at rest if no net external force acts on it?
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Multiple Choice
According to Newton's First and Second Laws, why does increasing the stopping distance of a vehicle reduce the severity of a crash?
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Multiple Choice
An elevator is going up at a constant speed in a very tall building. Assume the only forces acting on the elevator are a downward weight force and the force of a cable pulling the elevator up. Ignore air resistance and friction. How does the magnitude of the weight force compare to the magnitude of the force of the cable?
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Multiple Choice
An object that weighs 75 N is pulled on a horizontal surface by a horizontal pull of 50 N to the right. The friction force on this object is 30 N to the left. What is the acceleration of the object?
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