The crank arm is 20 cm long. If we assume you pedaled at a steady speed and therefore the crank was moving at a constant angular velocity (crank, not the knee as was measured by the goniometer) during the 2 pedaling speeds, what were the angular accelerations, tangential accelerations, radial accelerations, and tangential velocities for each pedaling speed?
find for 40 rpm
find for 80 rpm
I wasn't sure if you needed these values or not, so I included them just in case.
Initial Time (s) 
Final Time (s) 
Maximum Angular Position (deg) 
Minimum Angular Position (deg) 
Angular Displacement (deg) 
Average Angular Position (deg) 
Average Angular Velocity (deg/s) 
Max. Angular Velocity (deg/s) 
Average Angular Acceleration (deg/s^{2}) 
Max. Angular Acceleration (deg/s^{2}) 

40 rpm 
0.500 
4.960 
86.914 
37.732 
0.091 
62.943 
0.079 
117.187 
9.623 
520.020 
80 rpm 
0.900 
3.050 
83.948 
43.326 
0.274 
59.047 
1.585 
203.980 
34.707 
1964.723 
The crank arm is 20 cm long i.e. r = 0.20 m. From the table, the angular acceleration for 40 rpm and 80 rpm are
Tangential acceleration (a) will be for two cases
The radial acceleration will be for two cases
Tangential velocities are
Get Answers For Free
Most questions answered within 1 hours.