# FALLING OBJECTS

- Created by: Zara Rathod
- Created on: 06-03-13 15:59

**Falling objects**

**Weight- force of gravity on it. measured in newtons.**

**Mass- quantity of matter inside an object. measured in Kg.**

**1KG = 10N**

- **force of gravity on a 1KG object:** **GRAVITATIONAL FIELD STRENGTH** **(N/kg) ** if we **know the mass, we can calculate the** **weight:**

**WEIGHT= MASS x GRAVITATIONAL FIELD STRENGTH**

**GFS is always 10 so -->**

**1) calcuate the weight in N of a person of mass 55Kg= 55 x 10= 550N**

**W = mg **

where:

**w= weight in newtons (N)**

**m= mass in kg**

**g = GFS (n/kg)**

**if an object falls with NO OTHER forces acting on it, the resultant force (N) =** (**mass x acc.) will be its weight. -** because this is what is making it accelerate downwards.

**It will then accelerate constantly down at 10m/s squared. = ACCELERATION DUE TO GRAVITY.**

eg 1 kg object above the ground: the force of gravity is 10N (coz 1kg=10N) and so its acceleration ( by re-arranging the equation we get force/mass= 10N/1KG)= 10m/s squared.

**Objects falling through fluids- objects falling through air, liquid**

**Drag Force-** **a force opposing the motion of an object as it goes through a fluid such as air or liquid (the force that makes it go up)**

**- increases with speed**

**- so the resultant force (overall force)**…

## Comments

No comments have yet been made