Introduction to Projectile Motion

When the only force on an object is gravity:

• free fall

• acceleration

• gravity

• range

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An object in free fall is also called

• gravity

• projectile motion

• projectile

• tide

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Objects will accelerate towards Earth at a rate of

• 1.6 m/s²

• 9.8 m/s²

• 9.8 N

• 1.6 N

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What is the direction of the acceleration for any projectile?

• The direction the projectile is traveling.

• Down

• Up

• Sideways

If a projectile is launched with an initial vertical velocity (Voy) of 60 m/s, how long will it take to reach its highest point?

• 5 seconds

• 6 seconds

• 7 seconds

• 7.5 seconds

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A plane flying horizontally at 120 m/s drops a crate. When the crate strikes the ground 15 seconds later, what is the magnitude of the horizontal component of its velocity?

• 147 m/s

• 120 m/s

• 1800 m/s

• 8 m/s

At which of the following places does a projectile have the least velocity?

• At the peak of its trajectory

• Half way to the peak

• At the instant it is launched

• All points have the same velocity

At which of the following places does a projectile have the greatest acceleration?

• At the peak of its trajectory

• Half way to the peak

• At the instant it is launched

• All points have the same acceleration

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The acceleration during the whole trip, on the horizontal component, is always...

• 0 m/s²

• 3.6 m/s²

• 5 m/s²

• -9.8 m/s²

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The final velocity on the highest point is...

• 2.1 m/s

• positive

• 0 m/s

• negative

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