Which of the following scenarios demonstrates the replication of a scientific investigation?

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s.calculate eddy’s power rating

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader