A car weighing 1200 kg is uniform ly accelerated from rest and covers a distance of 40m in 5sec. Calculate the work done by the engine of car during this time . What is the final kinetic energy of car
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mass= 1200kg
s=40m
v=0
t=5 sec
We know that work=force × displacement
so we have to find Force to find Force we have to find acceleration hence,
s=ut+½at² => a= 3.2 m/s²
Now force, = 1200×3.2=3840N
Work= F×s= 153600J
Final Kinetic energy= ½mv²=0J
s=40m
v=0
t=5 sec
We know that work=force × displacement
so we have to find Force to find Force we have to find acceleration hence,
s=ut+½at² => a= 3.2 m/s²
Now force, = 1200×3.2=3840N
Work= F×s= 153600J
Final Kinetic energy= ½mv²=0J
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