A bus moves the first few meters of its journey with an acceleration of 5 m/s^2 in 10s and the next few meters with an acceleration of 15 m/s^2 in 20s. What is the final velocity in m/s if it starts from rest?(a) 100(b) 350(c) 450(d) 400I got this question in an internship interview.My doubt is from Kinematic Equations for Uniformly Accelerated Motion topic in section Motion in a Straight Line of Physics – Class 11

A bus moves the first few meters of its journey with an acceleration o

1.	A bus moves the first few meters of its journey with an acceleration of 5 m/s^2 in 10s and the next few meters with an acceleration of 15 m/s^2 in 20s. What is the final velocity in m/s if it starts from rest?(a) 100(b) 350(c) 450(d) 400I got this question in an internship interview.My doubt is from Kinematic Equations for Uniformly Accelerated Motion topic in section Motion in a Straight Line of Physics – Class 11
Answer» Right ANSWER is (b) 350 The EXPLANATION is: APPLY the first EQUATION of motion in both the parts. For first part, v1 = u + a1t1 = 0 + 5×10 = 50 m/s. For second part, v2 = u2 (= v1) + a2t2 = 50 + 15×20 = 350 m/s.

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