First of all, just wanna tell you its NOT a school assignment so please reply only if you can be of some help.
I coudnt get this problem so i'm hoping someone could help me out.
A car travelling at 5m/s is being accelerated uniformly and passes over the next 300m in 30 secs. Calculate 1). the acceleration of the car, 2). the speed of the car at the end of 20 sec.
the answers are 1). 1m/s^2 2). 25 m/s
I've tried solving the problem but i'm not getting the right answer. Could someone please try this n show me the working??
2006-09-27 04:37:33 · 2 answers · asked by mj 2 in Education & Reference ➔ Homework Help
please please please,..................................
2006-09-27 04:50:18 · update #1
First, to find a, use the distance formula:
d = vit + 1/2at^2
300m = 5 * 30 + 1/2a * 30^2
300 = 150 + 450a
150 = 450a
a = 1/3 m/s
2.) Use velocity formula to determine the velocity at time t:
v = vi + at
v = 5 + at
v = 5 + 1/3 * 20
v = 11 2/3
The problem must be written down wrong the answer is 1 m/s^2 and 25 m/s...
2006-09-27 05:00:45 · answer #1 · answered by ³√carthagebrujah 6 · 1⤊ 1⤋
the answers you want can only be obtained if the car travels the next 600 m in 30 sec rather than the 300 m given in the problem.
2006-09-27 05:17:37 · answer #2 · answered by jazideol 3 · 0⤊ 0⤋