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58 PROBLEMS Sections 3.1 and 3.2 3.1. (I) What net force must be exerted on a 7.0-kg saclk of potatoes to give it an acceleration of 3.5 m/sec 3.2. (I) Anet force of 30 N is applied to an object, which is then observed to accelerate at 0.25 m/sec2. Caleu- late the mass of the object. 3.3. (I) Calculate the acceleration of a rocket of mass 1.2×106 kg if the net force on it is 2.0 × 106 N Express in meters per second-squared and as a mul- tiple of the acceleration of gravity, g.

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3.1) net force F-ma- 7.0kgx3.5m/s2 - 24.5NN 3.2) force F 30 N , acceleration a 0.25 m s2 mass-m120kg 3.3) mass of rocket-m 1.

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