Question:
A velocity of a particle at an instant is $10\, m / s$. After $3\, s$ its velocity will become $16\, m / s$. The velocity at $2\, s$, before the given instant will be :
A velocity of a particle at an instant is $10\, m / s$. After $3\, s$ its velocity will become $16\, m / s$. The velocity at $2\, s$, before the given instant will be :
Updated On: Jul 5, 2022
- 6 m/s
- 4 m/s
- 2 m/s
- 1 m/s
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The Correct Option is A
Solution and Explanation
$16=10+3 a\left[\right.$ Here, $\left. u=10\, m / s,\, v=16\, m /s,\, t=3\, s,\, a=2 m / s ^{2}\right]$ and
$10=u+2 \times 2$
[u = required velocity] $=6\, m / s (\because t=2\, s )$
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Concepts Used:
Motion in a straight line
The motion in a straight line is an object changes its position with respect to its surroundings with time, then it is called in motion. It is a change in the position of an object over time. It is nothing but linear motion.
Types of Linear Motion:
Linear motion is also known as the Rectilinear Motion which are of two types:
- Uniform linear motion with constant velocity or zero acceleration: If a body travels in a straight line by covering an equal amount of distance in an equal interval of time then it is said to have uniform motion.
- Non-Uniform linear motion with variable velocity or non-zero acceleration: Not like the uniform acceleration, the body is said to have a non-uniform motion when the velocity of a body changes by unequal amounts in equal intervals of time. The rate of change of its velocity changes at different points of time during its movement.