# Homework Help: Please Teach Me how to find time in acceleration case

1. Oct 14, 2009

### shiga

1. The problem statement, all variables and given/known data

the case is if two bicycle want to make race for 200 m ,

Bicycle A
Vo1 ( Initial Velocity ) = 50m/s
a ( acceleration ) = 2 m/s2

Bicycle B
Vo1 ( Initial Velocity ) = 0 m/s
a ( acceleration ) = 10 m/s2

how I find the time and who will win the race ,

Please some body tech me :(
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Oct 14, 2009

### Staff: Mentor

Welcome to the PF. The reason we ask you to post the "Relevant Equations" is to help you to understand what equations to look to in order to help you solve this type of problem. What do you think the relevant equations would be? If you're not sure, search at www.wikipedia.com for "kinematic equations", or just look in your textbook.

3. Oct 14, 2009

### rl.bhat

What is the kinematic equation which relates the disparagement, initial velocity, acceleration and time. Find t1 and t2 and then decide who wins the race?

4. Oct 15, 2009

### shiga

may i konw the formula to find t1 and t2

5. Oct 15, 2009

### rl.bhat

Open any text book and search of set of kinematic equations. And select the proper equation to solve the problem.

6. Oct 15, 2009

### caitlincui

s=v0t+1/2*a*t^2

7. Oct 15, 2009

### rl.bhat

Correct. Now s is same for both. Find t1 and t2.