CHAPTER 2-3 1). A bike rider travel 50km in 3hours and 30mins. Find the averagev
ID: 1730194 • Letter: C
Question
CHAPTER 2-31). A bike rider travel 50km in 3hours and 30mins. Find the averagevelocity in km/hr. I did this.
90min/50km/hr=1.8 V=1.8 please let me no if this is done correctly.
2). From a dead stop a motorcycle accelerates at 13m/s^2 for100meters. find...a) The time it took to travel this distance...B).The velocity at the 100metre distance..
I did this:100/13=7.69 and 13/7.69=1.69 could u let me no if this is done right. CHAPTER 2-3
1). A bike rider travel 50km in 3hours and 30mins. Find the averagevelocity in km/hr. I did this.
90min/50km/hr=1.8 V=1.8 please let me no if this is done correctly.
2). From a dead stop a motorcycle accelerates at 13m/s^2 for100meters. find...a) The time it took to travel this distance...B).The velocity at the 100metre distance..
I did this:100/13=7.69 and 13/7.69=1.69 could u let me no if this is done right.
Explanation / Answer
Distance S = 50kmtime t= 3hours and 30mins = 3.5 hrs Average velocity v = S / t =14.285 km / h (2). Acleration a = 13m/s^2 Initial velocity u = 0 distance S= 100meters a) The time it took to travel this distance t = ? from the relation S= ut + ( 1/ 2) at^2 100= 0 + [0.5 * 13 * t ^ 2] = 6.5 t ^ 2 from this time t= 3.9222 s B). The velocity at the 100metre distance v = ? from the relation v ^ 2- u ^ 2= 2aS v = [ 2aS ] = 50.99 m / s