Forces and Motion Question
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Let g be the acceleration due to gravity at the surface of a planet of radius R. Which of the following is a dimensionally correct formula for the minimum kinetic energy K that a projectile of mass m must have at the planet’s surface if the projectile is to escape from the planet’s gravitational field?
- K=√gR
- K=mgR
- K=mgR
- K=m√gR
- K=gR