A car is moving 8.80 m/s when it begins to accelerate at 2.45 m/s^2. how much time does it take to trav 138m. please help me (':

7.6 s

Explanation:

Considering kinematics formula for final velocity as

Where v and u are final and initial velocities, a is acceleration and s is distance moved.

Making v the subject then

Substituting 8.8 m/s for u, 138 m for s and 2.45 m/s2 for a then

Also, v=u+at and making t the subject of the formula

Substituting 27.45 m/s for v, 8.8 m/s for u and 2.45 m/s for a then

Therefore, it needs 7.6 seconds to travel

f=ma newton

f=100x2.5=250n