How Long Will It Take the Car to Catch the Truck?

AI Thread Summary
The problem involves a car traveling at 187 km/h trying to catch a truck moving at 71 km/h, with the truck initially 150 meters ahead. The correct approach to find the time it takes for the car to catch the truck is to calculate the relative speed, which is 16 km/h or approximately 4.4 m/s. By dividing the distance (150 m) by the relative speed (4.4 m/s), the time is determined to be around 34 seconds. The initial calculations were incorrect due to a misunderstanding of the formula. The final answer confirms that it takes approximately 34 seconds for the car to catch the truck.
colin_delecia
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A car moving at 187km/h is behind a truck that's moving at 71km/h and is 150m ahead of the car

How long will it take the car to catch the truck ?

I'm literally in 2 lectures in my physics 101 class but I figure it would be cool to take a shot at the problem. This is what I did...


87km/h - 71km/h = 16km/h

16km/h = 4.4m/s

4.4m/s = 150 / t

t * 4.4m/s = 150
t = 150 - 4.4m/s
t = 146s

Well I checked it on masteringphysics h.w site and it was wrong...can't think of anything else.
 
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colin_delecia said:
A car moving at 187km/h is behind a truck that's moving at 71km/h and is 150m ahead of the car

How long will it take the car to catch the truck ?

I'm literally in 2 lectures in my physics 101 class but I figure it would be cool to take a shot at the problem. This is what I did...


87km/h - 71km/h = 16km/h

16km/h = 4.4m/s

4.4m/s = 150 / t

t * 4.4m/s = 150
t = 150 - 4.4m/s
t = 146s[/color]

Well I checked it on masteringphysics h.w site and it was wrong...can't think of anything else.

See red region.Do you got the point? Answer should around 38 seconds.
 
yea, 34s. I was supposed to do 150m / 4.4m/s. thanks
 
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