{"version":"1.0","provider_name":"Rainbow Dash Network","provider_url":"http:\/\/rainbowdash.net\/","type":"link","title":"aaaaaaaaaa (aaaaaaaaa)'s status on Sunday, 29-May-11 22:40:36 UTC","author_name":"aaaaaaaaaa (aaaaaaaaa)","author_url":"http:\/\/rainbowdash.net\/aaaaaaaaa","url":"http:\/\/rainbowdash.net\/notice\/136719","html":"Here's a good brain exercise for some bronies: \nRainbow Dash flies horizontally at a constant speed of 10 m\/s. At t = 0, she begins to flap her wings harder, giving her a constant horizontal acceleration of 8 m\/s^2. After how many seconds will she reach Mach 1, producing a Sonic Rainboom? Assume Mach 1 is 330 m\/s; ignore all drag effects."}