# CBSE 9th Physics Tutorials | Motion: Short Answer Type Question with Answers

Solution.

Solution

Solution.

### Problem 4. A particle starts from rest. Its acceleration (a) versus time (t) is as shown in the figure. What will be the maximum speed of the particle ?

Solution.

The area under acceleration time graph gives change in velocity. As acceleration is zero at the end of 11 sec.

### Problem 5. Can an object maintain its motion in the same direction while reversing the direction of acceleration?

Solution.

Yes, reversing the direction of acceleration will produce retardation. Consequently the velocity

will start decreasing with time but the direction of motion will be maintained till the velocity is

reduced to zero and gets reversed.

### Problem 6. It is the velocity and not the acceleration which decides the direction of motion of a body.” Justify this statement with the help of a suitable example.

Solution.

The direction of velocity is always in the direction of motion of the body, whereas the direction of acceleration may or may hot be is the direction of the motion of the body.

Hence, the velocity decides the direction of motion of the body.

This site uses Akismet to reduce spam. Learn how your comment data is processed.