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Motion. Mr. Hawkins – Physics. F= Newton. I t is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second. Acceleration. U nits of m/sec 2 meters/second/second Meters per second for every second. Force in Newton. F=ma. F=Newton (N) - PowerPoint PPT Presentation
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MotionMr. Hawkins – Physics
F= Newton
It is equal to the force that would give a mass of one
kilogram an acceleration of one meter per second per
second
Acceleration
Units of m/sec2
meters/second/second
Meters per second for every second
Force in Newton
F=ma
F=Newton (N)m=mass (Kg)a= acceleration m/sec2
Acceleration & Lab
Use TWO photogates
a= (0.05m/tb)-(0.05m/ta)
tab
Example
a= (0.05m/.0296s)-(0.05m/.0447s)
.2720s
a= (0.05m/tb)-(0.05m/ta)
tab
Acceleration= 2.1 m/sec2 or m/sec/sec
Force in Newton
F=ma F=Newton (N)m=mass (Kg)a= acceleration m/sec2
0.7N .28Kg = 2.5 m/sec2 or
m/sec/sec
Comparison of Both
0.7N .28Kg
= 2.5 m/sec2 or m/sec/sec
a= (0.05m/.0296s)-(0.05m/.0447s)
.2720s
Acceleration= 2.1 m/sec2 or m/sec/sec
There Different?
0.7N .28Kg
= 2.5 m/sec2 or m/sec/sec
Acceleration= 2.1 m/sec2 or m/sec/sec
2.1 m/sec2 – 2.5 m/sec2
2.5 m/sec2 * 100 = -16% Error
Your Turn
Mass of Car (kg)
Force along Ramp
(N) ta tb tab0.68 1.8 0.044 0.0286 0.26930.28 0.7 0.0447 0.0296 0.2720.68 3.1 0.0325 0.0211 0.19820.48 2.2 0.0327 0.0212 0.19990.68 4.3 0.0278 0.0179 0.1740.28 1.7 0.0284 0.0185 0.17390.68 5.4 0.0247 0.0159 0.15050.28 2.2 0.0253 0.0164 0.1547
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