Summer School Physics Notes PDF

Welcome Monday June 24th  Do Now: 1. What are your summer plans after summer school? 2.What do you know about Physics?  Physics: Speed,Velocity,Acceleration Objective: Students will understand the concepts of speed, velocity, and acceleration, and will be able to c...

Welcome Monday June 24th  Do Now: 1. What are your summer plans after summer school? 2.What do you know about Physics?  Physics: Speed,Velocity,Acceleration Objective: Students will understand the concepts of speed, velocity, and acceleration, and will be able to calculate each of them using appropriate formulas.  Speed Definition: a measure of how fast an object is moving Average speed can be calculated using the formula: distance divided by time Speed= Distance/Time. Units are important in speed calculations (e.g., meters per second, kilometers per hour)  Example 1. A train moves at a constant speed of 90 km/h. How far does it travel in 4 hours? S= 90km/4hrs= S=22.5Km/hr 2. A skateboarder travels 300 meters in 60 seconds. What is the speed of the skateboarder? S=300m/60sec= 5m/sec  Practice 1. A car travels 150 kilometers in 3 hours. What is its speed? 2. A boat travels 120 kilometers in 6 hours. What is the speed of the boat? 3. A car travels 350 kilometers in 7 hours. What is the speed of the car?  Answers 1. 1,200Km/3hr= 400km/hr south 2. 60km/2hr=30km/hr west 3. 800m/40sec= 20m/sec  Answers 1. s=150km/3hrs s= 50km/hr 2. s=120km/6hrs s=20km/hr 3. s=350km/7hrs s =20km/hr  Velocity Definition: Velocity is the displacement per unit of time. The difference between speed and velocity is velocity includes direction. Velocity can be calculated using the formula displacement divided by time. V=displacement/time.  Examples 1. A bird flies 150 meters east in 5 seconds. What is its velocity? V=150m/5sec V= 10m/sec east 2. A swimmer swims 200 meters east in 40 seconds. What is her velocity? V=200m/40sec V=5m/sec east  Practice 1. A plane flies 1,200 kilometers south in 3 hours. What is its velocity? 2. A cyclist rides 60 kilometers west in 2 hours. What is her velocity? 3. A skier moves 800 meters down a slope in 40 seconds. What is his velocity?  Acceleration Acceleration is the rate at which velocity changes over time. It can be positive or negative depending on whether the object is speeding up or slowing down. Positive acceleration means the object is moving faster, while negative acceleration means the object is moving slower.  Acceleration Acceleration can be calculated using the formula change in velocity/time. To calculate acceleration you subtract the two velocities then divide by time. A= v1-v2/T  Examples 1. A plane decelerates from 200 m/s to 100 m/s in 10 seconds. What is its acceleration? a=200m/s-100m/s/10sec a=-10m/s 2. A car increases its velocity from 20 m/s to 50 m/s in 10 seconds. What is its acceleration? a=50m/s-20m/s/10sec a=3m/s  Practice 1. A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration? 2. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s average acceleration? 3. A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds.  Work On your own Your teacher will now pass out a worksheet. You will work on calculations.  Welcome Back! Tuesday June 25  Do Now 1.Get out your Do Now as you walk in. 2. You will have 7 minutes to work on 5 problems similar to ones we did yesterday. 3.No phones or headphones or you will be send home.  Do Now swers 1.A 2. B 3. B 4. B 5. 2m/s INTRODUCTION TO NEWTON'S LAWS OF MOTION LEARNING OBJECTIVES: IDENTIFY AND DEFINE NEWTON'S THREE LAWS OF MOTION, EXPLAIN THE CONCEPT OF INERTIA AND PROVIDE EXAMPLES OF IT IN EVERYDAY LIFE, DESCRIBE THE RELATIONSHIP BETWEEN FORCE, MASS, AND ACCELERATION USING NEWTON'S SECOND LAW OF MOTION, APPLY NEWTON'S THIRD LAW OF MOTION TO EXPLAIN HOW ACTION AND REACTION FORCES ARE EQUAL AND OPPOSITE, ANALYZE AND INTERPRET REAL-LIFE SCENARIOS TO DETERMINE WHICH LAW OF MOTION IS BEING DEMONSTRATED  Newton's First Law of Motion Inertia is Newton's first law of motion. Definition: The tendency of an object to resist changes in its motion. Newton's first law of motion states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction, unless acted upon by an external force. Examples Of Newton’s First Law motion a book sliding off a table when it is bumped a car jerking forward when the brakes are suddenly applied A ball rolling down a hill A person sliding on ice A coin spinning on a table  Newton’s second Law Of Motion Newton's Second Law states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. The equation for Newton's Second Law is F = ma, where F represents force, m represents mass, and a represents acceleration.  Examples For example, if you push a heavy box with the same force as a lighter box, the heavier box will accelerate less due to its greater mass. If a 10 kg object is accelerating at 5 m/s², the force acting on it can be calculated as F = (10 kg) x (5 m/s²) = 50 N.  Newtons 3rd Law of motion Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object. For example, when you push against a wall, the wall pushes back with an equal amount of force.  Examples - Rowing a boat: When you push the oar against the water, the water pushes the boat forward. Balloon rocket: When you release air from a balloon, the air pushes the balloon forward. Jumping off a diving board: When you push down on the diving board, the diving board pushes you up into the air.  Work On your own Your teacher will now pass out a worksheet. You will work on calculations for the next 35minutes silently. If you finish before the timer goes off please stay in your seat and remain quiet.  Welcome Back! Wednesday June 26th  P2: Do Now 1. Get out your Do Now as you walk in. 2. You will have 7 minutes to work on 5 problems similar to ones we did yesterday. 3. If you have a question, please raise your hand! 4. We will go over the answers once everyone is done 5. PLEASE DO NOT SHOUT OUT ANSWERS! KEEP VOICE AT LEVEL 0.  Answer key 1. A) Newton's First Law 2. B) Newton's Second Law 3. C) Newton's Third Law 4.C) Newton's Third Law 5. B) Newton's Second Law  Objective Students will practice using box diagrams to determine the net force and whether it is balanced or unbalanced.  Net Force Definition: all the forces acting on an object. Net Force determines the object's acceleration and overall motion.  Calculating Net force. To calculate net force first determine in which direction the forces are going in. If both forces are going in the same direction add them. If they are going in different directions you subtract them.  Examples. 1.An object is being pushed to the right with a force of 10 N, and there is a frictional force of 4 N acting to the left. Since the force are in opposite directions you subtract the forces (10N- 4N=6N) 25 N 15 N The diagram above shows the forces going the same direction  Balanced vs Unbalanced Force. Balanced Forces: When the forces acting on an object are equal in magnitude and opposite in direction, they are said to be balanced. When the forces acting on an object are not equal in magnitude or not opposite in direction Balanced forces always equal to zero  Example 25N 25N The diagram above shows both forces going in opposite so you would subtract the forces. 25N-25N= 0 N, Our netforce is zero so our forces are Balanced.  Welcome Back! Thursday June 27th