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. v o
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) a) ellipse b) semicircle c) parabola d) triangle
14. A projectile is launched at an angle of 37 o with a speed of 50 m/s from the ground. a) Find the horizontal component of its initial velocity c) Write the x and y equations of motion b) Find the vertical component of its velocity. 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?