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7. Solve the following examples.a) An object moves 18 m in the first3 s. 22 m in the next 3 and 14 m inthe last 3 s. What is its averagespeed?(Ans: 6 m/s)b) An object of mass 16 kg is movingwith an acceleration of 3 ms.Calculate the applied force. If thesame force is applied on an object ofmass 24 kg. how much will be theacceleration? (Ans: 48 x, 2 m/s)c) A bullet having a mass of 10 g andmoving with a speed of 1.5 m/s.penetrates a thick wooden plank ofmass 90 g. The plank was initiallyat rest. The bullet gets embedded inthe plank and both move together.Determine their velocity.(Ans: 0.15 m/s)d) A person swims 100 m in the first40s, 80 m in the next 40 s and 45 min the last 20 s. What is the average(Ans: 2.25 m/s)Speed?

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