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CP Physics WS ch6 (launching at an angle) Reading Ws and problems Review 1. Write the formula for the horizontal component of velocity for a projectile launched at an angle. 2. Write the formula for the initial vertical component of velocity for a projectile launched at an angle. 3. The _____________component will be constant during a projectile's flight while the __________ will not be constant. 4. The time squared rule is applied to the (horizontal or vertical) motion of a projectile. 5. The _____________motion for a projectile is similar to that of an object thrown straight up into the air. 6. When a projectile is launched at an angle, its vertical component of velocity is ____________ when it reaches the very top of its path. 7. The path followed by a stream of water out of a water fountain is in the shape of a _______________. ___8. vo cos is the formula for the ______________component of the initial velocity of a projectile being launched. a) horizontal b) vertical c) diagonal d) curved ___9. For a ______o angle, the cosine and sine are equal. a) 37 b) 53 c) 30 d) 60 e) 45 ___10. The ______________ component of velocity remains constant while a projectile is in flight. a) horizontal b) vertical c) diagonal d) initial ___11. The "time-squared" rule is applied to the ______________motion of a projectile. a) horizontal b) vertical c) diagonal d) initial ___12. At the very top of its path, a projectile's _______________velocity component is zero. a) horizontal b) vertical c) diagonal d) initial ___13. The path followed by a projectile is in the shape of a(n) c) parabola d) triangle a) ellipse b) semicircle 14. A projectile is launched at an angle of 37o with a speed of 50 m/s from the ground. a) Find the horizontal component of its initial velocity b) Find the vertical component of its velocity. c) Write the x and y equations of motion d) Write the Vx and Vy equations e) Find the time it takes for it to hit the ground f) Find the distance it traveled 15. A ball rolls of a table top at 15m./s. The table is 1 m off the floor. How far out does the ball hit the floor? 16. A bird is flying horizontally at a height of 4m when it drops a rock. The rock travels 5m forward before it hits the ground. How fast was the bird flying? 17. A potato is launched from the ground at 45, and hits the ground 4.5 seconds later. How far did it go? (write the equations, figure out Vyi, Vxi, then t at the ground, then x when it hits the ground) 18. A flaming ball of dung is shot from a castle 5m off the ground at an angle of 50˚. It has an intial speed of 40m/s. Find :a) where the ball hits the ground b) where is the ball at 2 seconds? c) how fast is it going at 2 seconds?