Question

If there are no external forces acting on an object, it will

• A. change its speed
• B. move with a higher velocity
• C. remain in its state of rest
• D. either remain in its state of rest or in uniform motion

Answer 1

Answer: (D)

either remain in its state of rest or in uniform motion

Newton’s First Law of motion states that a body at rest will remain at rest and body at motion will remain in uniform motion unless an unbalanced force acts on it to change its state of rest or of uniform motion. Therefore if no external force is acting on a body, a body will either remain in state of rest or uniform motion.