Expert: Richard J. Raridon - 12/2/2008

Question
what is the speed of a car that travels 150km in 3 hrs?
&
what distance will a car traveling 65km/hr?
&
a car travels240 km in 2 hours and a sprinter travels a 100 m in 9.5 sec. whis is traveling faster and by how much?
&
whatis the accelerationn of a car that goes from 40km/hrto 80km/hr in 2 seconds?
& a vehicle that goes from 5 m/s to 45 m.s in 8 seconds,what is the acceleration?
& ur bike has a masss of 9.1 kg.u accelerate at a rate of 1.79m/s2. caculae the orcce that is accelerating the bike?
& last but not east
a runnner has a mass of 89 kg. he produces a force of 84Newtons between the ground and his running shoes.how fastdoes he accelerate?


Answer
1. 150/3 = 50km/h
2. every hour it will travel 65km
3. the car is traveling 33.3m/s and the sprinter is going 10.5m/s
4. a = (v2-v1/t = (22.22-11.11)/2 = 5.56m/s^2
5. a = (45-5)/8 = 5m/s^2
6. F = ma = (9.1)(1.79) = 16.3N
7. a = F/m = 84/89 = 0.94m/s^2