June 2022 Paper 2 Q12

12 A car is travelling along a straight horizontal road with initial velocity \(u\) m s⁻¹

The car begins to accelerate at a constant rate \(a\) m s⁻² for 5 seconds, to reach a final velocity of \(4u\) m s⁻¹

Express \(a\) in terms of \(u\).

Circle your answer. [1 mark]

• \(a = 0.2u\)
• \(a = 0.4u\)
• \(a = 0.6u\)
• \(a = 0.8u\)