Consider dropping a piece paper and a brick from the same height. Although in theory they should both strike the ground at the same time; in practice the brick will always strike the ground first. The reason is because of air resistance. As the paper falls to the ground air resistance is pushing the paper up, this slows the acceleration of the paper.

It is known that as the velocity of an object increases the air resistance acting on the object increases. If we consider jumping out of a plane and free fall towards the Earth the F.B.D. would be as follows:

Now the force of gravity acting on the object does not change, however as we speed up towards the Earth the force of air resistance is increasing. Eventually there reaches a point when the Fg = Fair when this occurs we are no longer accelerating towards the Earth, but fall with a constant velocity that is called the TERMINAL VELOCITY.

The terminal velocity of an object in free fall depends on two main factors: 1. The mass of the object
2. The surface area exposed to the air resistance

For example: A human free falling towards Earth has a terminal velocity of 190 km/h. If you use a parachute the terminal velocity is about 20 km/h.

If we were to observe this motion on a speed time graph it would be as follows:

Notice that the velocity of the object increase until it reaches a constant value which is the terminal velocity. Also notice that the acceleration of the object is NOT CONSTANT, meaning the constant acceleration equations do not apply, but Newton’s second law still does.

Laboratory:

Design a laboratory to determine the proportionality and proportionality constant between the terminal velocity and the mass. You will have available to you coffee filters, meter stick, tape and a stop watch.

You will submit a Laboratory Report including the following sections:...

...
Background Information
Terminalvelocity is when a falling object reaches a constant velocity due to a balance in the forces of weight and air resistance. In this experiment, we dropped marbles of difference weights in 100 ml of oil to calculate their terminalvelocity.
Research Question
How does the mass of an object effect its terminalvelocity?
Aim
Our aim is to measure the...

...resistance is stronger then the terminalvelocity that is when the object is going at a small velocity.
TerminalVelocity
When there is equal force acting on an object when falling such as gravity and air resistance at that stage it is called constant speed or terminalvelocity. When the object is dropped the force of gravity initially is 100% but as it falls the air resistance becomes...

...how is time, t related to the inclination of the track? Explain why?
Time and position of velocity are interrelated to each other and the height and gravitational pull affects the acceleration of a moving and a free falling object.
3. From the data obtained, how would you account the difference between the picket fence’s acceleration and the value of g?
The value of the slope of a graph of average velocity versus time will be the acceleration due to gravity of...

...2: SPEED, VELOCITY AND ACCELERATION
2.1 Distance and Displacement
• Distance is the total length covered by a moving object irrespective of the direction of motion, i.e. only the magnitude is of importance.
• Displacement is the distance measured in straight line AND in a specific d__________________. Both magnitude and d_________________ are important.
Example 1
A car travels 5 km due east and makes a U-turn back to travel a further distance of 3 km.
Find (a) the...

...motion of objects without considering the effects that produce the motion. This experiment will show how to determine the linear motion with constant (uniform) velocity particularly the dynamic cart and linear motion with constant (uniform) acceleration, (e.g. free fall of motion). At the end of the experiment we found out that the velocity is a speed that involves direction of an object as well as the time. While for the acceleration, it is directly proportional...

...limitations of manures. Write any one function of the following: [3] (a) Lysosome (b) Golgi apparatus (c) Endoplasmic Reticulum (a) What is mixed cropping? (b) Write any two advantages of mixed cropping.
11.
12.
13.
14.
[3]
15. The velocity time graph of a ball of mass 20 g moving along a straight line on a level ground is given below. How much force does the ground exert on the ball to bring it to rest? [3]
16.
(a) A car accelerates uniformly from 18...

...consideration of the forces that cause the motion. There are four activities done in this experiment. Graphical analysis of human motion, where displacement vs time and velocity vs. time were graphed. Graphical analysis of motion where in the 10th seconds the total displacement is 18.75m, average velocity is 1.88m/s and instantaneous velocity is 3.76m/s. Reaction time where one of the normal reaction time among the group is 0.16s and the reaction time...

...initial height. A motion detector is mounted on the ceiling directly above the ball, facing down. So, the positive direction -- the away-from-the-detector direction -- is downward. Draw the position, velocity, and acceleration graphs.
Since moving downward is a positive direction, is the velocity positive when the ball falls, 0 when it hits the ground, and then negative when it moves up? Is the accerlation positive (9.8) as the ball falls, very positive when it...