A high jumper of mass 5kg falls 2m, assuming all the gravitational potential energy is converted to kinetic energy what is the speed of the athlete when they land on the mat?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

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(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)