(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A motorcycle stunt-rider moving horizontally takes off from a point 1.25 m above the ground,

landing 10 m away as shown.

2. Relevant equations

3. The attempt at a solution

using tan [tex]\alpha[/tex] = [tex]\frac{Opp}{Adj}[/tex]

[tex]\alpha[/tex] = 7.1

then using v^{2}=u^{2}+2as

v^{2}=0

let a = g = 10

s = 1.25(since we are calculating vertical)

u^{2}= 25

u = 5

but u is Xsin [tex]\alpha[/tex]

therefore x = [tex]\frac{5}{sin\alpha}[/tex]

x = 40 ms-1

><

no the answer is 20ms-1

what is wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Motorcycle stunt-rider mechanics problem

**Physics Forums | Science Articles, Homework Help, Discussion**