Four particles are moving along X–axis. Their coordinates (in metres) as function of time…
Physics · JEE Advanced · NTA Exams — Kinematics
Four particles are moving along X–axis. Their coordinates (in metres) as function of time (in seconds) are given by
x1 (t) = 3.5 – 2.7 t3
x2 (t) = 3.5 + 2.7 t3
x3 (t) = 3.5 – 2.7 t2
x4 (t) = 3.4 – 2.4 t – 2.7 t2
Which of these particles is/are speeding up for t > 0?
x1 (t) = 3.5 – 2.7 t3
x2 (t) = 3.5 + 2.7 t3
x3 (t) = 3.5 – 2.7 t2
x4 (t) = 3.4 – 2.4 t – 2.7 t2
Which of these particles is/are speeding up for t > 0?
- All the four
- only 2
- only 2 and 3
- 2, 3 and 4 only
Answer
(B) only 2
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