Question

If a particle has a constant speed in a constant direction

• A. It must have a constant deceleration
• B. It must have a constant acceleration
• C. It need not have a constant velocity
• D. It must have a constant velocity

Answer 1

Answer:

D. It must have a constant velocity

To have a constant velocity, an object must have a constant speed in a constant direction. Constant direction constrains the object to motion to a straight path. Newton's second law (F=ma ) suggests that when a force is applied to an object, the object would experience acceleration.