A car of mass 1500kg is moving with the speed of 90km/Hr. Calculate the amount of force applied to bring it at rest in 5 seconds.
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Explanation:
Newton 2nd law
Force=mass×acceleration
Force=m×(v/t)
Here m=1500kg V=90km/hr=90×5/18=25m/sec.
Time=5 sec
Force=1500×(25/5)=7500N
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Answered by
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Force=mass×acceleration
as acceleration =speed/time
speed=90km/hr
=90×1000/3600
=25m/sec
acceleration=25/5
=5 m/ s²
Force=1500×5
=7500N
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