9. A body moving along a
straight line at 20 m/s
under goes an acceleration
4m/s^2 After 2s its speed will*
be
Answers
Answered by
121
Answer:
Explanation:
Solution,
Here, we have
Initial velocity of body, u = 20 m/s
Acceleration of body, a = 4 m/s²
Time taken by the body, t = 2 seconds
To Find,
Final velocity of body, v = ?
According to the 1st equation of motion,
We know that,
v = u + at
So, putting all the values, we get
v = u + at
⇒ v = 20 + 4 × 2
⇒ v = 20 + 8
⇒ v = 28 m/s
Hence, the final velocity of the body is 28 m/s.
Answered by
25
Answer:
28 m/s
Explanation:
Given :
- Initial velocity of the body = u = 20 m/s
- Acceleration of the body = a = 4 m/s²
- Time accelerated for = t = 2 seconds
To find :
- Final velocity of the body after 2 seconds
Using the first equation of motion :V=u+at
V=20+4×2
V=20+8
V=28
The velocity of the body after 2 seconds is equal to 28 m/s
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