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9 questions
According to Newton's first law of motion, the net force acting on an object cannot be zero if its velocity is not constant (that is, if its speed or direction changes).
Have students work in pairs or small groups to assess whether or not the net force acting on each of the following objects is zero using evidence and Newton's first law.
Example: Is it non-zero or zero?
A container sitting atop a slope (Answer: zero)
zero
non-zero
With someone pushing on it horizontally, a large box remains at rest on the ground.
zero
non-zero
An automobile navigates a circular curve at a constant speed.
zero
non-zero
a the cart was moved steadily and quickly up a straight ramp
non-zero
zero
A young man riding a whirling Ferris wheel at a consistent speed is ____.
A raindrop falls at a consistent rate is _____.
zero
non-zero
Kicking two soccer balls of equal weight, but one harder than the other
Zero
Non-Zero
Observing a 16-pound bowling ball being expelled onto the retrieval rack as opposed to an 8-lb bowling ball being ejected onto the retrieval rack
zero
non-zero
Running and pulling two wagons, one of which has one companion and the other has three.
non-zero
zero
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