# CP Physics WS 3-3 (launching at an angle) ```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?
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