An object is dropped from rest. Its speed just before reaching the ground is 5.0 m/s. Which change would result in a speed of 15.0 m/s just before reaching the ground? (Ignore air resistance.)
Drop the object from three times the original height.
Drop the object from nine times the original height.
Use an object with three times the mass.
Use an object with nine times the mass.
204 exam-style questions on CIE IGCSE Physics Motion, covering Motion. Each one has a worked solution and a mark scheme showing where the marks go.