Concepts Of Physics MCQ Edition [Volume 1]
- Exam
- Concepts Of Physics MCQ Edition [Volume 1]
- Subject
- Physics
- Chapter
- Rest and Motion Kinematics
Concepts Of Physics MCQ Edition [Volume 1] · Physics · Rest and Motion Kinematics
It is possible for an object to have
It is possible for an object to have
Options
- Aa nonzero acceleration without possessing a varying velocity
- Ba nonzero acceleration without possessing a varying speed
- Ca varying speed without possessing a varying velocity
- Da varying velocity without possessing a varying speed
Correct answer
D. a varying velocity without possessing a varying speed
Step-by-step solution
Velocity is a vector quantity which has both magnitude (speed) and direction.
Acceleration is defined as the rate of change of velocity. If the velocity is constant, the acceleration must be zero. Thus, an object cannot have a nonzero acceleration without a varying velocity.
If an object moves with a constant speed but changes its direction of motion (for example, in uniform circular motion), its velocity is varying. Because the velocity is varying, it possesses a nonzero acceleration.
Therefore, it is possible for an object to have a nonzero acceleration without a varying speed, and a varying velocity without a varying speed.
Acceleration is defined as the rate of change of velocity. If the velocity is constant, the acceleration must be zero. Thus, an object cannot have a nonzero acceleration without a varying velocity.
If an object moves with a constant speed but changes its direction of motion (for example, in uniform circular motion), its velocity is varying. Because the velocity is varying, it possesses a nonzero acceleration.
Therefore, it is possible for an object to have a nonzero acceleration without a varying speed, and a varying velocity without a varying speed.