The velocity component with which a projectile covers certain horizontal distance is maximum at the moment of? a) hitting the ground b) highest point c) projection d) none of these

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

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Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s