1.1. An object is released near the surface of the Moon at time t = 0. Fig. 1.1 shows the variation of displacement s with time t of the object from the point of release.

Fig. 1.1

(i) State the significance of the negative values of s.

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(ii) State two assumptions about the motion of the object. 

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1.2. Use the graph in Fig. 1.1 to determine a value for the acceleration of free fall close to the surface of the Moon.

1.3. Use Fig. 1.1 to estimate the instantaneous velocity of the object when t = 1.5 s.

1.4. (i) On Fig. 1.1, sketch the variation of displacement s with time t if the same object was released close to the surface of the Earth instead.

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(ii) Describe and explain the features of your sketch. 

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