1.         Find the missing values in the following table.

2.         Calculate the weight of each of the following on Earth where the gravitational field          strength is approximately 10 N/kg :

            (a)        a girl whose mass is 50 kg
           (b)        a dog of mass 20 kg
            (c)        a 9 kg box
            (d)       a ball of mass 0·5 kg

3.         Each of the following weights was measured on Earth where the gravitational field           strength is approximately 10 N/kg. Calculate the mass of each object.

            (a)        a man who weighs 750 N
            (b)        a tin of peas which weighs 4·5 N
            (c)        a chair which weighs 350 N
            (d)       a rabbit which weighs 40 N

4.         The mass of a puncture repair kit is 0.03 kg. What is its weight on Earth?

5.         Calculate the weight on Earth of a postcard which has a mass of 0.002 kg.