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Projectile Review

Projectile Review. Quantity that has both magnitude and direction:. Scalar Directrix Pointer Vector. The horizontal and vertical parts of a diagonal vector. Resultants Components Cosecants Hypotenuses . The path of a projectile is called its:. Trail Trajectory Route Projection.

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Projectile Review

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  1. Projectile Review

  2. Quantity that has both magnitude and direction: • Scalar • Directrix • Pointer • Vector

  3. The horizontal and vertical parts of a diagonal vector. • Resultants • Components • Cosecants • Hypotenuses

  4. The path of a projectile is called its: • Trail • Trajectory • Route • Projection

  5. The trajectory of a launched projectile is a • Straight line • Hyperbola • Parabola • Circular arc

  6. Acceleration describes: • How fast something is moving • How fast something is moving and in what direction • How quickly the velocity is changing • How quickly the position is changing

  7. If air resistance is negligible the acceleration of an object in free fall (on Earth) ______ • Depends on how heavy it is • Is 9.8 m/s2 upward if the object is moving up and 9.8 m/s2 downward if the object is moving down. • Is 9.8 m/s2 down regardless of the direction the object is moving.

  8. Speed a dropped object will be traveling 3 seconds later is most nearly: • 10 m/s • 15 m/s • 25 m/s • 30 m/s

  9. A ball is thrown straight up. At its highest point its velocity is ____ and its acceleration is _____ • 0, 0 • 0, 10 m/s2 down • 10 m/s, 0 • 10 m/s, 10 m/s2 up

  10. If an object is thrown straight upward at 23 m/s what is its velocity 2.0 seconds later • About 10 m/s up • About 10 m/s down • About 3 m/s up • About 3 m/s down

  11. A ball thrown straight upward takes approximately 2 seconds to reach its highest point. At what speed was it thrown? • 5 m/s • 10 m/s • 20 m/s • 30 m/s • 40 m/s

  12. A ball that is thrown straight up at 30 m/s reaches a maximum height of • 10 m • 30 m • 45 m • 90 m

  13. A ball is thrown straight upward at 20 m/s. It returns to where it was thrown in about: • 1.0 s • 2.0 s • 3.0 s • 4.0 s

  14. The horizontal acceleration of a projectile on earth. • +9.8 m/s2 • -9.8 m/s2 • 0.0 m/s2 • -32 ft/s2

  15. A projectile is launched horizontally from a cliff at 40 m/s. Three seconds later the horizontal component of its velocity is: • 10 m/s • 30 m/s • 40 m/s • 50 m/s

  16. A projectile is launched horizontally from a cliff at 40 m/s. Three seconds later the vertical component of its velocity is about: • 10 m/s • 30 m/s • 40 m/s • 50 m/s

  17. A projectile is launched horizontally from a cliff at 40 m/s. Three seconds later its speed is: • 10 m/s • 30 m/s • 40 m/s • 50 m/s

  18. A projectile is launched at 20 m/s at an angle of 30o above horizontal. The horizontal component of its initial velocity is: • 20 m/s • 10 m/s • 17.3 m/s • 19.6 m/s

  19. A projectile is launched at 20 m/s at an angle of 30o above horizontal. The vertical component of its initial velocity is: • 10 m/s • 20 m/s • 17.3 m/s • 9.8 m/s

  20. A projectile is launched at 20 m/s at an angle of 30o above horizontal. At its highest point the total velocity is ____ and the acceleration is _____. • 20 m/s 9.8 m/s/s • 0.0 m/s 9.8 m/s/s • 10 m/s 0 m/s/s • 17.3 m/s 0 m/s/s • 17.3 m/s 9.8 m/s/s

  21. A projectile is launched at 20 m/s at an angle of 30o above horizontal. The amount of time it remains airborne is about. • 1.0 seconds • 2.0 seconds • 4.0 seconds • 6.0 seconds

  22. A projectile launched at 20 m/s at an angle of 30o lands on a level surface. How far away does it land? • 40 meters • 20 meters • 34 meters • 9.8 meters • 17 meters

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