A particle moves along a line with displacement metres at time seconds. At what time is the particle first at rest?
Answer and explanation
Correct answer: B. 1 second
- Step 1: , which is zero first at .
Answer
1 second.
Why not the others: 3 second: gives the second time at rest. 2 second: gives the time of minimum velocity. 0 second: assumes it starts at rest.
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