Multiple Choice
When switch S in the figure is closed at time , which of the following best describes the motion of a block of mass attached to a horizontal frictionless surface and pulled by a constant force ?
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6. Intro to Forces (Dynamics)
Newton's First & Second Laws
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
According to Newton's first law, if the net force on an object is zero (), which statement must be true about its motion?
A
It can have a nonzero acceleration as long as its speed is constant.
B
Its acceleration is zero, so it remains at rest or moves with constant velocity.
C
It must be at rest.
D
It must be moving with increasing speed.
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