6. Solve for x. Sides Have: Want: Function: ( ) =

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1 Physics, Mr. Kent Daily Worksheet: Trig in Physics Name: 1. In we use three functions,,. 2. You re always given an and one and you re always asked to find. 3. Label the sides: 4. Provide the 3 trigonometric functions in equation format: Questions 5-8: Use the following triangle: 5. Set up the three trig equations: Sin ( ) = Cos ( ) = Tan ( ) = 6. Solve for x. Sides Have: Want: Function: ( ) =

2 7. Solve for y using the Pythagorean Theorem. y = 8. Solve for y using the Cosine function. y = 9. There are 2 ways to solve for the second missing side: a. b. 10. In ΔABC, angle A is the right angle. Angle C = 52 o. AB = 18. Draw the triangle then find AC and BC. AC =, BC = 11. One way of remembering the trig functions Sin = O/H, Cos = A/H and Tan = O/A is 12. What extra step must you perform to use trig functions in physics? 13. Draw the right triangle then solve for Normal Force

3 Questions 14 16: Draw the right triangle 14. A ball travels through the air at 25 m/s at an angle of 50 o over horizontal. 15. A jet taking off from Logan Airport is travelling at 70 m/s at an angle of 12 o over the runway. 16. John pushes on a table top. He exerts a force of 80 N at an angle of 70 o with the table top. 17. Calculate Normal Force using your problem 13 triangle. 18. Calculate Horizontal Velocity using your problem 14 triangle. 19. Calculate downward force using y our problem 16 triangle. What is Normal Force?

4 Physics, Mr. Kent Daily Worksheet: Projectile Motion #1 Name: 1. Definition of Projectile : 2. Definition of Projectile Motion : 3. A ball rolls at 2.5 m/s on a frictionless surface. How far does it travel in 12 seconds? 4. What formula should you use for constant (unaccelerated) motion? Problems 5 7: Relate to the following diagram 5. Provide the missing values in the above diagram. 6. How long will it take for Jordan to reach his peak? 7. What will be Jordan s Hang Time?

5 8. Let's say I toss a ball toward the back of the room. What will its path look like? (draw it including the ball at different spots) 9. Let's say I shoot a pool ball off of a table? What will its path look like? (draw it including the ball at different spots) 10. What shape from geometry describes the path of most projectiles?. What projectile motion does not follow a parabola? 11. Is the vertical velocity (v x ) of a projectile constant or variable?. 12. What happens to the vertical velocity (v y ) of a tossed ball as it rises?. Why? 13. What happens to the vertical velocity (v y ) of a tossed ball as it falls?. Why? 14. What is the vertical velocity (v y ) of a tossed ball at its peak?. Why? 15. If we ignore air resistance, does horizontal velocity (v x ) change?. The horizontal velocity (v x ) of a projectile is 16. Draw the velocity of a projectile and its perpendicular components in two ways:

6 17. A ball is thrown at 12 m/s at an angle of 55 degrees above horizontal. Draw a triangle, calculate the initial horizontal and vertical velocities of the ball, then draw a parabola showing the ball s complete path. Include a dot with its 3 initial velocities. 18. Loretta shoots an arrow at 20 m/s at an angle of 10 degrees over horizontal. Draw a triangle, calculate the initial horizontal and vertical velocities of the arrow, then draw a parabola showing the arrows complete path. Include a dot with its 3 initial velocities.

7 Physics, Mr. Kent Classwork: Projectile Motion #1 Name: 1. Tiger Woods hits a golf ball down the fairway. Draw the flight of the ball (include the fairway). 2. A baseball rolls rapidly off the edge of a table. Draw the flight of the ball (include the table). 3. A person strikes a ping pong ball directly upward. When the ball leaves the paddle, it is travelling at 6.5 m/s. a. What is the ball s velocity at its peak? b. How long does it take the ball to reach that peak? c. How high does the ball travel? d. How long does the ball stay in the air? 4. A field goal kicker strikes a ball causing it to travel at 17 m/s 25 degrees above horizontal. Draw the complete flight of the ball. Include a dot for initial velocity. Calculate all initial velocities. Draw and label them in your diagram.

8 Physics, Mr. Kent Projectile Motion #2 Name: 1. Projectiles travel along a. A ball tossed upward: b. A cannonball shot horizontally: 2. A tossed ball moves & at the same time Because there s no horizontal velocity is. 5. Is there a vertical force exerted on projectiles? If so, what? a. Effect of that force on v y of rising projectiles: b. Effect of that force on v y of falling projectiles:

9 Questions 6-8: Steven Gostkowski attempts a field goal. When the ball leaves his foot, it is traveling at a speed of 25 m/s at 20 o over the football field. How far will the ball travel down the field? 6. Draw a velocity triangle and solve for v ix and v iy. 7. Determine the hang time of the football. 8. How far forward does the ball travel? 9. The classic Projectile Motion problem has 3 steps. How far will a projectile travel horizontally? Step Velocities Involved 10. A child throws a stone up into the air. When the stone leaves her hand, it is travelling at 15 m/s at an angle of 80 o over horizontal. How far does the rock land from the child? a. Draw a triangle and find the initial horizontal and vertical velocities. b. Find hang time. c. Find horizontal distance

10 Physics, Mr. Kent Projectile Motion Quiz #1 Name: Questions 1 & 2: Draw the right triangle and solve for both missing sides. 1. Draw triangle ABC with angle A as the right angle. Angle B = 55 o. AC = 10 m. Find the lengths of sides AB and BC 2. Draw triangle ABC with angle A as the right angle. Angle B = 25 o. AB = 10 m. Find the lengths of sides AC and BC 3. Big Pappi hits a line drive to center field. When the ball leaves the bat, the ball is travelling at 30 m/s at an angle of 23 o over the field. What are the ball s initial horizontal and vertical velocities? v x = v y =, Draw a triangle. 4. A golfer strikes a ball with his 5 iron causing it to travel initially at 50 m/s at an angle of 35 o over the horizontal fairway. How far forward does the ball travel? a. Draw a triangle and calculate the initial velocities. v x = v y = b. Calculate the ball s hang time. c. How far will the ball travel forward?