The Explosion in a Cannon Exerts an Average Force of 30,000

question 20

Multiple Choice

The explosion in a cannon exerts an average force of 30,000 N for L meters, the length of the cannon. What length of the cannon would be necessary to shoot a 2.0 kg projectile from the surface of the Earth to a distance of 6.84 × 10⁸ m from the center of the Earth (the same as the distance to the Moon) ? (G = 6.67 × 10⁻¹¹ N·m²/kg², ME = 5.97 × 10²⁴ kg, and RE = 6.37 × 10⁶ m.)

• A) 2.7 km.
• B) 3.0 km.
• C) 3.9 km.
• D) 4.1 km.
• E) 5.0 km.

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