Question

An object moves along a straight line with an acceleration of 2 m/s$^{2}$. If its initial speed is 10 m/s, what will be its speed 2 seconds later ?​

Answer 1

v=u+at

v=10+2×2

v=10+4=14m/s

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Answer 2

Answer:

Its speed 2 seconds later will be 14 m/s.

Explanation:

Given:

• Initial velocity (u) = 10 m/s

• Time (t) = 2 s

• a = 2 m/s

To find:

Speed of the object two seconds later i.e. final velocity.

Solution:

Using Newton's first law of motion

v = u + at

Now substitute the values, we get

v = 10 + 2 × 2

= 10 + 4 = 14 m/s.

Thus, its speed two seconds later will be 14 m/s.

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