Find the downhill acceleration of an object sitting on a ramp without sliding 3 different ways. 1*. Use an inclinometer on a phone. Tilt the ramp until it is at a 20 degree angle. Then switch to the accelerometer and see the downhill acceleration. It will be the blue number. 2. Draw a picture of an object sitting on a ramp at a 20 degree angle. Find the downhill force. Assume the mass = 1 kg, and nd the downhill acceleration. 3. Calculate the downhill acceleration using the formula given in class for a ramp tilted at a 20 degree angle