If a body starts from a point, and returns back to the same point, then its
Correct answer: A. Average velocity is zero but not average speed
- A. Average velocity is zero but not average speed
- B. Average speed is zero but not average velocity
- C. Both average velocity and average speed are not zero
- D. Both average speed and average velocity are zero
Explanation
Average speed is calculated as the total distance traveled divided by the time taken, while average velocity is calculated as the total displacement divided by the time taken. In this scenario, the body returns to its starting point, making the displacement zero. Therefore, the average velocity is zero. However, the average speed is not zero because the body covers a certain distance. Options B, C, and D are incorrect because they either misunderstand the definitions or misapply the concepts of average speed and average velocity.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
Practise Force and Motion
1,416 free Force and Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Force and Motion questions
The distance travelled is given by:
If a projectile is thrown with 19.6m/s velocity at 30o with x-axis, time taken to reach highest point?
A train takes 1 hour to go from one station to the other. It travels at a speed of 30kmh-1 for first half hour and at a speed of 50 kmh-1 for the next half hour. The average speed of the train is:
Velocity and acceleration are in the same direction when
When the average velocity of a moving body is equal to its instantaneous velocity, then it is moving with
If the initial speed of a projectile is doubled. What will happen to its range?