Standard Science Primary 6 Energy

Two identical cars, Car X and Car Y, are travelling on a road. Car X is moving at 50 km/h and Car Y is moving at 80 km/h. Which statement is correct?

A Car X has more kinetic energy than Car Y.
B Neither car has kinetic energy because they are on a flat road.
C Car Y has more kinetic energy than Car X.
D Both cars have the same amount of kinetic energy.
Show Worked Solution

Worked Solution

Step 1: Kinetic Energy (KE) depends on mass and speed. Step 2: Since the cars are identical, their mass is the same. Step 3: Car Y is moving at a higher speed (80 km/h). Step 4: Therefore, Car Y has more KE.

Correct answer: Car Y has more kinetic energy than Car X.

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