Hello, can someone help me please with ONLY question b. ii. (not iii) I got 4.9 m s^-2 but I'm not sure. Thank you

Advice on answering Question 4 This question relates to Topic 3, Parts 1, 2 and 3 All numerical answers in this question should be given to an aPP[QP'j'te number of significant figures. ; A scientist is investigating a proposed mission to the moon of another planet, in which an observation satellite will orbit the moon. It is planned that the satellite will be placed into a circular orbit about the moon at a distance of 1.8 x 10 m from its centre. One complete orbit will take 12.5 hours. What is the speed of the satellite in m s'? (3 marks) The satellite is held in orbit by the force of gravity. In no more than two sentences, explain how you know from its orbit that it must be being acted on by a force. (2 marks) As a result of the orbiting satellite, does the moon move? Explain your answer. (Advisory word count: 50 words) - (2 marks) As part of its mission, the satellite will drop a small lander onto the moon's surface. Write down an equation that relates the weight of an object to its mass. You must define any variables that you use. (1 mark) On Earth, the lander weighs 36 N. You are reminded that one new- tonis 1 kg m s | On the moon the lander will weigh 16 N. What is the acceleration due to gravity on the moon? On Earth take, gz = 9.81 m s72. (3 marks) At release, the vertical speed of the lander is zero. Neglecting all other forces except gravity, which you can assume to be constant, use your answer from part (b)(ii) to calculate the vertical speed of the lander after 300 s. RL/-?'H'{S'& ' _ (2 marks) Part way through its descent, the lander enters the moon''s thin atmosphere and a parachute is opened. Figure 2 below shows the lander before and after the parachute is opened. Copy the figure and show the forces acting on the lander in the two cases