1. A baseball player throws a ball horizontally. Which statement best describes the ball's motion after it is thrown? [Neglect the effect of friction.

A. Its vertical speed increases, and its horizontal speed increases.

B. Its vertical speed remains the same, and its horizontal speed increases.

C. Its vertical speed increases, and its horizontal speed remains the same.

D. Its vertical speed remains the same, and its horizontal speed remains the same.

2. A ball projected horizontally with an initial velocity of 20.0 meters per second east, off a cliff 100 meters high. During the flight of the ball, what is the direction of its acceleration? [Neglect air resistance.]

A. Westward

B. Downward

C. Upward

D. Eastward

3. As a projectile rises towards the peak of its trajectory, the vertical velocity will decrease; as it falls from the peak of its trajectory, its vertical velocity will ____________.

A. decrease B. increase C. not change D. not be affected 4. The final horizontal velocity of a projectile is ____________________. A. always equal to the initial horizontal velocity.

B. less than the initial horizontal velocity.

C. greater than the initial horizontal velocity.

D. always equal to 9.8 m/s2.

5. Which describes horizontally launched projectile motion?

A. We have constant motion in horizontal because there is no force acting on our object in horizontal direction.

B. At the top, the velocity is decreasing in the amount of gravitational acceleration.

C. The vertical speed two seconds before reaching its peak is the same as the vertical speed two seconds after falling from its peak.

D. As the projectile rises towards its peak, it is slowing down and as it falls from its peak, it is speeding up.

6. An archer uses a bow to fire two similar arrows with the same string force. One arrow is fired at an angle of 60° with the horizontal, and the other is fired at an angle of 45° with the horizontal. Compared to the arrow fired at 60°, the arrow fired at 45° has a shorter flight time and __________.

A. shorter horizontal range C. shorter vertical range B. longer horizontal range D. longer vertical range

7. The distance a projectile travels is dependent upon __________.

A. air resistance B. launch angle C. launch speed. D. All of the above

8. An arrow is fired at 45.5 m/s from a 5.75 m high tree branch, at an angle of 60 above the horizontal. What maximum height, above the ground, will the arrow reach?

A. exactly 79.2 m

B. less than 79.2 m

C. 79.2 m minus 5.75m high from a tree branch

D. 79.2 m plus 5.75m high from a tree branch

9. A javelin was thrown at different angles. Which is true about the maximum height it can reach?

A. A javelin thrown at 100 will have the maximum height

B. A javelin thrown at 300 will have the maximum height

C. A javelin thrown at 500 will have the maximum height

D. A javelin thrown at 800 will have the maximum height

10. Grade 9 Science class wants to investigate what is the maximum range when a ball is thrown at different angle projection. Which observation is true about the maximum range the ball can have? A. A ball thrown at 300 angle projection will have the same range as 800 angle projection.

B. The smaller the angle the highest the height.

C. A ball thrown at 450 angle will have the lowest height and maximum range.

D. The maximum range is obtained when the ball is launched at 450angle.

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May 11-20 question pa pa sagot naden po​​