Forces & Motion.

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Presentation transcript:

Forces & Motion

Motion A change in the position of an object. Give an example!

Force A force is a Push Or Pull

Mass The amount of matter in an object or substance.

Describe Acceleration

Describe Acceleration A change in velocity – which may be: A change in speed Starting Stopping Speeding up Slowing down A change in direction Acceleration is caused by unbalanced forces More

Describe Acceleration Deceleration is also called negative acceleration - it means an object is slowing down When acceleration is calculated, it may be a negative number

How do we calculate it? http://www.harcourtschool.com/activity/newton/index.html to figure out formulas for F M A

Formulas to live by! F=m x a m=F/a A=F/m

F M A

So, what's the answer? Mackenzie was pushing a cart that weighed 15 pounds with 20 Newtons of force. What is the unknown? What does it equal?

Describe Speed

Describe Speed Speed is a way to describe motion Types of speed---- Average speed - Rate of motion calculated by dividing the distance traveled by the amount of time it takes to travel that distance Constant speed - Speed that does not change Instantaneous speed - Speed of an object at any given time

What is the formula used to calculate speed?

What is the formula for calculating speed? Speed is calculated by dividing distance by time –

Calculate This Speed A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast was the football player running?

Remember to include the UNITS!! Calculate this Speed: A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast was the football player running? Speed = Distance ÷ Time Speed = 100 m ÷ 20 s Speed = 5m/s Remember to include the UNITS!!

Velocity The speed AND direction of a moving object. Ex: Jerrod was going 35mph southeast.

Qualitative Data Deals with descriptions. Data can be observed but not measured. Colors, textures, smells, tastes, appearance, beauty, etc. Qualitative → Quality

Quantitative Data Deals with numbers. Data which can be measured. Length, height, area, volume, weight, speed, time, temperature, humidity, sound levels, cost, members, ages, etc. Quantitative → Quantity