What is the force?

She is about 120 pounds so to find her mass we need to convert. 1 lb = .45 kg(120 * .45 = 54 kilograms) Her initial acceleration is 10 m/s. Use the formula: force = mass * acceleration or F = ma.Force = (54 kg) * (10m/s) The force is 540 kg over m/s or 540 N.