Grade 11 Physics Study Unit 1: Kinematics + Intro
Grade 11 Physics Study Guide SPH3U1
Unit 1: Kinematics + Intro
How to count significant figures:
-Embedded 0’s count (i.e. 101 has 3 sig figs)
-Any numbers that aren’t zeros count (i.e. 5263 has 4 sig figs)
-0’s after the decimal place count (i.e. 1.00 has 3 sig figs)
-Trailing 0’s (i.e. 2000 has 4 sig figs)
-Numbers after the first non-zero (i.e. 0.0002102 has 4 sig figs)
How to add and subtract numbers with proper sig figs:
The result will have the least amount of numbers after the decimal place.
(i.e. 1.23 + 1.3 + 10.004 = 12.5)
How to multiply and divide numbers with proper sig figs:
The result will have the least number of sig figs
(i.e. 3.0 x 12.60 = 38)
Metric Conversions
The following is a neat way to ensure success …show more content…
When speed is constant, acceleration = 0 and therefore, net force = 0 based on the Fnet = ma formula
Universal Gravitation
G = Universal Gravitational Constant
G = 6.67 x 10-11 (measured in Nm2kg2)
It is used in the formula Fg= Gm1m2r2
Where r is the distance between the centres of the 2 objects
Also, g= Gm1r2
For the Earth, g = 9.8m/s^2
Units
Mass: kg
Time: s
Distance: m
Speed: m/s
Forces: N (newtons)
Acceleration: N/kg or m/s^2
Unit 3: Energy
Work
A force through a distance
Work = applied force times displacement
W= …show more content…
It is because of the difficulty to spin it that electrical energy is created.
This website explains things really well: http://www.animations.physics.unsw.edu.au//jw/electricmotors.html#mandg
Motors
-Motors use slip rings to make DC
-turns electrical energy into mechanical rotational energy
-opposite of a generator (even in diagrams; inner magnets’ poles are opposite. The magnet rotates because each time it is either repelled or attracted by the permanent magnet and has to move that way.)
Unit 5: Waves and Sound
3 types of Vibrations 1- Torsional: an object twists around its axis at the rest position Ex. A twisted tire swing
2- Longitudinal: the particles vibrate parallel to the direction of the motion of the wave Ex.
Unit 1: Kinematics + Intro
How to count significant figures:
-Embedded 0’s count (i.e. 101 has 3 sig figs)
-Any numbers that aren’t zeros count (i.e. 5263 has 4 sig figs)
-0’s after the decimal place count (i.e. 1.00 has 3 sig figs)
-Trailing 0’s (i.e. 2000 has 4 sig figs)
-Numbers after the first non-zero (i.e. 0.0002102 has 4 sig figs)
How to add and subtract numbers with proper sig figs:
The result will have the least amount of numbers after the decimal place.
(i.e. 1.23 + 1.3 + 10.004 = 12.5)
How to multiply and divide numbers with proper sig figs:
The result will have the least number of sig figs
(i.e. 3.0 x 12.60 = 38)
Metric Conversions
The following is a neat way to ensure success …show more content…
When speed is constant, acceleration = 0 and therefore, net force = 0 based on the Fnet = ma formula
Universal Gravitation
G = Universal Gravitational Constant
G = 6.67 x 10-11 (measured in Nm2kg2)
It is used in the formula Fg= Gm1m2r2
Where r is the distance between the centres of the 2 objects
Also, g= Gm1r2
For the Earth, g = 9.8m/s^2
Units
Mass: kg
Time: s
Distance: m
Speed: m/s
Forces: N (newtons)
Acceleration: N/kg or m/s^2
Unit 3: Energy
Work
A force through a distance
Work = applied force times displacement
W= …show more content…
It is because of the difficulty to spin it that electrical energy is created.
This website explains things really well: http://www.animations.physics.unsw.edu.au//jw/electricmotors.html#mandg
Motors
-Motors use slip rings to make DC
-turns electrical energy into mechanical rotational energy
-opposite of a generator (even in diagrams; inner magnets’ poles are opposite. The magnet rotates because each time it is either repelled or attracted by the permanent magnet and has to move that way.)
Unit 5: Waves and Sound
3 types of Vibrations 1- Torsional: an object twists around its axis at the rest position Ex. A twisted tire swing
2- Longitudinal: the particles vibrate parallel to the direction of the motion of the wave Ex.