Question

(a) A spaceship with a mass of 20,000 kg is travelling in a straight line at a constant speed of 300 m/s in deep space, far from any planets or stars. Its rocket engines must be firing. True or False. Briefly justify your response. (b) A parent pushes a small child on a swing so that the child moves rapidly away while the parent remains at rest. How does the magnitude of the force that the child exerts on the parent compare to the magnitude of the force the parent exerts on the child? A. The force on the child is larger in magnitude. B. The force on the parent is larger in magnitude. C. The forces have equal magnitudes. D. The child exerts zero force on the parent. E. There is no way to tell

Answer 1

Part メーク( a Mco ne accelerah erh ce,hence ,'A: 0 V = constant .Rocket must not ba firing as not extenal force is preaout te overcome False Part (b) Using Neuston's Hhird law ie. E rery achon has its hat Hha forces hare equal meuituies, au hsy acf an action reachon pairs