List all the formulae in Physics
1 answer:
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<h2>Answer :</h2>
□ The Final velocity of body = 45 m/s
Initial velocity of body = 0 m/s
Acceleration of body = 3 m/s²
Time taken by body = 15 sec
<h2>To Calculate :</h2>Final velocity of body = ?
<h2>How To Calculate ?</h2><h3>❒ </h3>Here in this question we are provided that a body is in rest so it's initial velocity will be 0 m/s (because from rest), Acceleration of body is 3 m/s², and Time taken is also given which is 15 sec.
<h3>❒</h3>To calculate the Final velocity of body we'll use the first equation of motion which says v = u + at
Where,
- v is the Final velocity in m/s.
- u is the Initial velocity in m/s.
- a is the Acceleration in m/s².
- t is the Time taken in second.
From first equation of motion
- ⇒ v = u + at
- ⇒ v = 0 + 3 × 15
- ⇒ v = 0 + 45
- ⇒ v = 45
Hence, the Final velocity of body is 45 m/s.
Answer:
t = 1.09 s.
Explanation:
This is a one-dimensional kinematics question, so the equations of kinematics will be sufficient to solve the question.
This quadratic equation can be solved using determinant.
Of course, we will choose the positive time.