- #1
physicskillsme
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I'm stuck with this.
The force from your car's motor is 6,000 N. The mass of the car is 900 kg. What will be you final speed after driving a distance of 25 m
a. if you start from rest
b. if you have an initial speed of 20 m/s.
I can get W=fd but I can't get how to find the speed (velocity)
W=fd
W=6000*25 = 150,000J
KE=1/2mv^2
I am at a loss where to pick up speed. I can get accleration by doing
A=F/m
A=6.67m/s/s
But accleration isn't the same as speed.
I know there must be a way of working back from the info I have but I really just can't see it.
I'd really appreciate some help.
The force from your car's motor is 6,000 N. The mass of the car is 900 kg. What will be you final speed after driving a distance of 25 m
a. if you start from rest
b. if you have an initial speed of 20 m/s.
I can get W=fd but I can't get how to find the speed (velocity)
W=fd
W=6000*25 = 150,000J
KE=1/2mv^2
I am at a loss where to pick up speed. I can get accleration by doing
A=F/m
A=6.67m/s/s
But accleration isn't the same as speed.
I know there must be a way of working back from the info I have but I really just can't see it.
I'd really appreciate some help.
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