# Questions tagged [gravity]

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### How to subtract gravity from raw acceleration of an MPU9250 - 9DOF IMU

I'm working with an MPU9250 and using the Madgwick Filter. For what I know I need to subtract the GRAVITY from my X, Y, Z Acceleration values, basically, some kind of gravity compensation to get ...
44 views

### Problem in Z-Axis motion acceleration with MPU6050

I extracted motion acceleration with MPU6050 and removed gravity. Now, the problem is when I put the sensor in no-move status, I read nearly zero acceleration in z-axis but when I turn it 180 degree ...
359 views

### Transient drop in accelerometer gravity reading when in motion

I am using Pololu AltIMU-10 v4's accelerometer to monitor the acceleration of my system. I understand that when the sensor is placed upright on the table, it should measure 1g in the +ve z-axis. ...
454 views

### Charging a phone using Potential Energy

How can i convert the potential energy of a mass into mAh for this reason: How heavy would a mass have to be if I wanted to charge my Iphone (2800mAh) using a apple phone charger (5V 1000mAh). The ...
1k views

### Frictional Force in a DC Motor

I have wheel that is on an axle running through two supported bearings. In one quadrant of this wheel, there is a (small) mass. As expected, the mass has a bias of being as close to the ground as ...
139 views

### Making accelerometer sense nonconventional gravity

I am working on a project of finding the bevel angle of a worm drive blade. To find the angle, I have decided to use 2 accelerometers. One of it being my reference and will sit on the footplate, the ...
192 views

### Are Inclinometers/Angle Gauge's independent of gravity

To give a bit of background, I am working on a DIY wheel alignment just to save some money and possibly learn a thing or two. The camber/caster involves measuring an angle that is parallel to the ...