From the velocity-time graph (weight of car 1000 kg, peak velocity 15 m/s), the maximum kinetic energy is—

• a$1.25 \times 10^{5}$ J
• b$5 \times 10^{4}$ J
• c$1.25 \times 10^{4}$ J
• d$6.2 \times 10^{5}$ J