Question

8. A body is moving with a speed of 20 m/s. When a certain force is applied, an
acceleration of 4 m/s^2 is produced. After how much time will its velocity become 80 m/s?​

Answer 1

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$\huge\tt\colorbox{aqua}{SOLUTION}$

Final Velocity , V=80 m/s

Initial Velocity, U=20 m/s

Acceleration, A=4m/s2

APPLYING FIRST eqn OF MOTION :

➥V=u + at

➥ 80=20+4t

➥60=4t

➥T=15sec

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Answer 2

Refer the Attachment hope it helps u

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