Forces In Action

Question 1

Equation for force and it’s units

Answer 1

Force=mass x Velocity
Newtons (N)
Kgms^-2
A force of 1 newton will give a mass of 1kg mass an acceleration of 1ms^-2 in the direction of the force

Question 2

Describe mass and weight

Answer 2

Mass- kg

Weight- N = mass x gravity

Question 3

What is centre of mass?

Answer 3

It is the point in which the weight is in effect on a object. Where the weight is equal on all points of the centre of gravity

Question 4

Describe how to find the centre of gravity of an irregular object

Answer 4

Suspend an object and then use a plumb line and draw along it repeat this and the point where they all cross is the centre of mass

Question 5

Name the six key types of forces

Answer 5

Weight 
Friction 
Drag
Tension
Upthrust
Normal Contact Force

Question 6

Define weight

Answer 6

The gravitational force acting on an object through its centre of mass

Question 7

Define Friction

Answer 7

The force that arises when two surfaces rub against each other

Question 8

Define drag force

Answer 8

The resistive force an object traveling through a fluid (liquid or gas) the same as friction

Question 9

Define tension

Answer 9

The force within a stretched object (e.g. Rope or cable)

Question 10

Define Upthrust

Answer 10

An upward buoyancy force acting on an object when it is in a fluid

Question 11

Define Normal Contact force

Answer 11

A force arising when one object rests against another object