# Question #5bcc7

Jan 31, 2018

One is a bit of a cheat, but ...

#### Explanation:

Roll a cart down a friction-compensated ramp pulled by falling weights and measure the acceleration ($\frac{{d}^{2} s}{\mathrm{dt}} ^ 2$)

Time a falling object (steel ball dropped from an electromagnet to start the timer is common.)

Take a 1kg mass and weigh it on newton scales.

I’m sure there are more, but those are the 3 that I do with students in the lab.