a certain force exerted for 1.2 second is the speed of an object from 1.8 metre per second to 4.2 metre second later the same force is applied for 2 seconds how much does the speed change into second
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the force applied for 1.2 sec changes the velocity from 1.8m/s to 4.2m/s.
So, the acceleration produced by the force
⏩Now again the same force is applied after the body gains a velocity 4.2m/s , so it will produce the same acceleration, that is 2m/s²
In this case, initial velocity (u) = 4.2m/s
acceleration (a) = 2m/s²
and time (t) = 2sec
Using the 1st equation of motion,
v = u + at
v = 4.2 + 2(2)
= 4.2 + 4 = 8.2m/s
Therefore, the velocity changes to 8.2m/s
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