Yes ... in that is about 55 MPH in the US Keep in mind that any speed, even 5 MPH can be dangerous and kill people just as easily as when going 75 MPH. There is no really 'safe' highway speed - the general rule is 'reasonable and proper'. There are times when the posted limit is just too fast!!
No, you'll get rear-ended. That is slightly less than 50 MPH which is not much above the lowest legal speed on a super-highway.
First, convert the speeds to SI units, that is, to meters/second. Then, simply subtract the difference in speed by the 2 seconds. The result will be in meters/sec2.
Highway 80
7 car lengths
Assuming 1 14 hour= 1.1/4 as in one and a quarter hoursthen 80 km = 1 hourand 20 km = 1/4 hourso 80 + 20 = 100 km
3 hours 15 minutes.
120 Km/hr in highway such as Fahaheel Express Highway (Road 30) and Road 40. Speed camera anywhere. Some busy roads are limited to 80 Km/hr.
720 km / 9 hr = 80 km / hr.
Velocity is speed and direction. Truck speed is 80 km/hr. Truck velocity is 80 km/hr going east. Its velocity is also -80 km/h going west, and 0 km/h going north or south.
Assume each runs at constant speed, both in the same direction, with no sudden turns or other evasive maneuvers(yeah, it's not like the gazelle wants to evade the cheetah or anything).The cheetah is catching up, closing at the rate of (100 - 80) = 20 km per hour.20 km/hr is 5.56 m/s (1 hr is 3600 s and 1 km is 1000 m).At that rate, how long does it take to close 70 meters ?Distance = (speed) x (time)Time = (Distance) / (speed) = (70) / (5.56) = 12.6 seconds
yes
Depends which state you're in. Texas has the highest Interstate speed limits, with some sections being allowed up to 80 MPH.