If the displacement-time graph for a particle is parallel to displacement axis, what is the velocity of the particle?

09/30/2023 Ajit kumar 75 Views 0 Comments

Q.1. If the displacement-time graph for a particle is parallel to displacement axis, what is the velocity of the particle?

Ans. Infinity.

Q.2. What is the average velocity of a particle when it returns to the starting point? Can its average speed be zero?

Ans. When a body returns to its starting point, its average velocity is zero. But its average speed cannot be zero.

Q.3. What is the relationship between the distance travelled and the time elapsed for motion with uniform velocity?

Ans. The distance travelled is same over equal intervals of time, however, small the intervals may be.

Q.4. If the displacement-time graph for a particle is parallel to time axis, what is the velocity of the particle?

Ans. Zero.

Q.5. What determines the direction of motion of an object: velocity or acceleration ?

Ans. Velocity.

Q.6. What does the slope of velocity – time graph represent?

Ans. The slope of the velocity-time graph gives the acceleration.

Q.7. A car manufacturer advertises that the brakes are so perfect that the car stops instantaneously. Comment.

Ans. His claim is not true. If the car stops instantaneously, then it must possess infinite retardation, which is not possible.

Q.8. Give an example of a body which covers a certain distance, but its displacement is zero

Ans. Earth has a zero displacement about its own axis after 24 hours, whereas it covers a very large distance.

Q.9. Give an example of an accelerated body, moving with a uniform speed.

Ans. A dust particle which lies on the circumference of a revolving rim of a bicycle has a uniform speed.

Q.10. Can the displacement of a particle be zero when the distance travelled is not zero?

Ans. Yes.

Q.11. Why is the motion of an athlete moving along the circular path an accelerated motion?