Question

Free fall of an object in vacuum is with:

• A. Uniform speed
• B. Uniform velocity
• C. Uniform acceleration
• D. Variable acceleration

Answer 1

Answer:

C. Uniform acceleration

• When an object falls freely in a vacuum, the only force acting upon it is gravity. Because there is no air resistance (drag) in a vacuum to oppose the motion, the object continues to speed up at a constant rate. • Acceleration is the rate of change of velocity. Since the force of gravity is constant near the Earth's surface, the object's velocity increases by the same amount (9.8 m/s) every second.