Question

9. Which of the following changes when a particle is
moving with uniform velocity?
(a) Position
(b) Speed
(c) Velocity
(d) Acceleration
10. In question number 9, the average velocity of the object
between t = 2 s and t = 4 s is
(a) 5 m s-1
(b) 10 m s-1
(c) 15 m s-1
(d) 20 m s-1​

Answer 1

9. The position changes when a particle is moving with uniform velocity.

Speed (velocity) is defined as the rate of distance covered by the body per unit of time.

Uniform velocity

• If a body covers equal distance in an equal interval of time, then the body is said to be moving with uniform velocity.
• The velocity is not changing with the change in time during this condition.

10. Given:

Time taken(t)=4-2=2s

To find the average velocity of the object

Solution:

The body has a uniform velocity. Thus, the velocity remains the same.

In this condition, the average velocity is given as,

$Average velocity=Displacement(s)/timetaken(t)$

Hence, using the above formula the average velocity can be deduced.