A train has an initial velocity of 44m/s and an acceleration of -4m/s2. Its velocity after 10 sec is

 Physics Jamb, Waec, Neco Past Questions & Answers on Speed, Velocity and Acceleration

QUESTIONS 5. A train has an initial velocity of 44m/s and an acceleration of -4m/s2. Its velocity after 10 sec is 

A. 2m/s B. 4m/s C. 8m/s D. 12m/s E. 16m/s

JAMB 1983 Ans: 4m/s

SOLUTIONS

• Initial velocity = u = 44m/s
• Acceleration= deceleration = -4m/S²
• Velocity= v = ?
• Time = t = 10s

Using first equation of motion

v = u + at

v = 44 + (-4)(10)

v = 44 - 40

v = 4m/s