PHYSICS · Multi-part · CBSE · Physics · Force and Laws of Motion · Force and Laws of Motion
Problem
During the first 8s after ignition, a rocket motor exerts a constant thrust of 3.0×105N on the rocket.
(i) Convert this thrust into dynes and express it in scientific notation.
(ii) If the mass of the rocket at that moment is 7500kg, calculate its initial acceleration.
(iii) Assuming the acceleration remains constant for 8s, determine the increase in speed the rocket gains during this interval.
(iv) Briefly comment on why using consistent units throughout parts (i)–(iii) is essential when solving problems involving force and motion.