Define thrust-to-weight ratio and its significance for liftoff.

• A. Thrust divided by vehicle weight; a ratio greater than 1 at liftoff is required for ascent capability
• B. Weight divided by thrust; a ratio greater than 1 at liftoff is required
• C. Thrust minus weight equals acceleration
• D. Thrust-to-weight ratio is always less than 1 for liftoff

Answer: (A)