Two-Dimensional Motion Quiz Form
Answer all 10 questions on two-dimensional motion physics. This is a real quiz. Please show your work where required.
1. Define two-dimensional motion in your own words.
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2. A ball is thrown horizontally from a 20 m high cliff with a speed of 5 m/s. How far from the base of the cliff does it land? (Assume g = 9.8 m/s²)
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3. Which of the following is true about the acceleration of a projectile in two-dimensional motion (neglecting air resistance)?
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It is constant and downward.
It increases as the projectile moves.
It is zero.
It is always perpendicular to velocity.
4. Calculate the magnitude of the resultant velocity when a boat moves north at 4 m/s and the river flows east at 3 m/s.
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5. A projectile is launched at 30° above the horizontal with a speed of 20 m/s. What is the initial vertical component of its velocity? (Give your answer in m/s)
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6. Explain why the horizontal and vertical motions of a projectile are independent of each other.
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7. Which of the following statements about projectile motion is correct?
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The horizontal velocity is constant.
The vertical velocity is constant.
Both horizontal and vertical velocities are constant.
The acceleration is upward.
8. A stone is thrown at 15 m/s at an angle of 45° above the horizontal. Calculate the time it takes to reach its maximum height. (g = 9.8 m/s²)
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9. Describe what happens to the range of a projectile if the initial speed is doubled, keeping the angle the same.
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10. A soccer ball is kicked with an initial velocity of 12 m/s at 37° above the horizontal. What is the horizontal distance it travels before landing? (g = 9.8 m/s²)
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