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A hammer head with mass 0.5 kg strikes the head of a nail at a speed of 10m/s .The nail is driven 1 cm into a piece of wood. What is the average force on the nail?
1,The distance, s moved by a vehicle in time, t with an initial velocity, v and a constant accelaration, a is given by s = v t + 1/2 at squared. Find the time taken to cover 84 metres with a constant acceleration 2metres a second squared if the initial velocity is 5 metres a second. Solve by factorisation. 2, The diagonal of a rectangle is 15 metres and one side is 2 metres longer that the other. Find the dimensions of the rectangle by using the quadratic formula.