# How to Calculate and Solve for Reaction: Lift Moves Down | Motion The image above represents reaction: lift moves down.

To compute for reaction: lift moves down, three essential parameters are needed and these parameters are mass (m), acceleration (a) and acceleration due to gravity (g).

The formula for calculating reaction: lift moves down:

R = m(g – a)

Where;

R = Reaction
m = Mass
g = acceleration due to gravity
a = Acceleration

Let’s solve an example;
Find the reaction when the mass is 28, acceleration is 9 and acceleration due to gravity is 9.8.

This implies that;

m = Mass = 28
g = acceleration due to gravity = 9.8
a = Acceleration = 9

R = m(g – a)
R = 28(9.8 – 9)
R = 28(0.80)
R = 22.4

Therefore, the reaction is 22.4 N.

Calculating the Mass when the Reaction, the Acceleration and the Acceleration due to Gravity is Given.

m = R / g – a

Where;

m = Mass
R = Reaction
g = acceleration due to gravity
a = Acceleration

Let’s solve an example;
Find the mass when the reaction is 42, the acceleration is 8 and the acceleration due to gravity is 9.8

This implies that;

R = Reaction = 42
g = acceleration due to gravity = 9.8
a = Acceleration = 8

m = R / g – a
m = 42 / 9.8 + 8
m = 42 / 17.8
m = 2.359

Therefore, the mass is 2.359.

Calculating the Acceleration when the Reaction, the Mass and the Acceleration due to Gravity is Given.

a = g – (R / m)

Where;

a = Acceleration
R = Reaction
m = Mass
g = acceleration due to gravity

Let’s solve an example;
Find the acceleration when the reaction is 35, mass is 19 and acceleration due to gravity is 9.8.

This implies that;

R = Reaction = 35
m = Mass = 19
g = acceleration due to gravity = 9.8

a = g – (R / m)
a = g – (35 / 19)
a = 9.8 – 1.84
a = 7.96

Therefore, the acceleration is 7.96.

Calculating the Acceleration when the Reaction, the Mass and the Acceleration is Given.

g = (R / m) + a

Where;

g = acceleration due to gravity
R = Reaction
m = Mass
a = Acceleration

Let’s solve an example;
Find the acceleration due to gravity when the reaction is 40, the mass is 4 and the acceleration is 7.

This implies that;

R = Reaction = 40
m = Mass = 4
a = Acceleration = 7

g = (R / m) + a
g = (40 / 4) + 7
g = 10 + 7
g = 17

Therefore, the acceleration due to gravity is 17.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the reaction: lift moves down.

To get the answer and workings of the reaction: lift moves down using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

To get access to the professional version via web, you need to register and subscribe for NGN 1,500 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Motion under Physics. Now, Click on Reaction: Lift Moves Down under Motion The screenshot below displays the page or activity to enter your values, to get the answer for the reaction according to the respective parameters which are the mass (m), acceleration (a) and acceleration due to gravity (g). Now, enter the values appropriately and accordingly for the parameters as required by the mass (m) is 28, acceleration (a) is 9 and acceleration due to gravity is 9.8. Finally, Click on Calculate  As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the reaction: lift moves down and presents the formula, workings and steps too.