Calculate the change in velocity of 70 kg object being pulled with 1000N force force 10 s

71.43m/s

Explanation:

F = m(v - u) /t

Give mass m = 70kg

Force f = 1000N

Time t = 5 secs

Change in velocity (v-u) =?

Using the above formula

1000 = 70( v - u) / 5

Cross multiply

1000 x 5 = 70(v - u)

Divide both sides by 70

5000/70 = 70(v - u) /70

71.43 = v-u

v-u = 71.43m/s

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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connect the batteries in series and hope