If you're hit by an e-bike travelling at 40km/h, the impact is similar to falling 4 floors

Yesterday, Mothership.sg published an article with video footage of three e-bike riders ~~riding~~ speeding at speeds of up to 40km/h along what looked like the Kallang Park Connector.

15km/h'>

is the cycing speed limit on Park Connector Network (PCN). Power-assisted bicycles are not allowed on PCN....

Posted by Beh Chia Lor - Singapore Road on Tuesday, 8 December 2015

We decided to pose the following question to our readers:

Any'>

physicists here to fill in the blank: Being hit by a bike at 40km/h is the same as falling from ____ storeys.

Posted by Mothership.sg on Wednesday, December 9, 2015

In case you are curious, the answer is:

3.5 storeys, if we make two assumptions about the weights of the e-bike (40kg) and cyclist (60kg) and estimate the height of one storey to be three metres.

We thank a brave Mothership.sg reader Ng Chew Yee, who answered the call and tackled our question.

Here is how she worked out the sums for us:

This reckless BMW driver in S’pore has a habit of cutting right like he just don’t care

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If you're hit by an e-bike travelling at 40km/h, the impact is similar to falling 4 floors

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If you're hit by an e-bike travelling at 40km/h, the impact is similar to falling 4 floors

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