Projectile Motion - Quiz 1

Two objects roll off a table. Ball #1 rolls off a table that is 1.2 m off the ground with a velocity of 3 m/s. Ball #2 rolls off the same table with a velocity of 6 m/s. Which values are the same for both projectiles?

• The speeds of the projectiles when the two balls hit the ground.

• How long the two balls are in the air.

• How far the two balls land from the table.

• The initial velocities.

Two projectiles are horizontally launched off platforms of the same height, as shown in the diagram. If projectile B is launched further than A, what must be true?

• B is launched out faster than A.

• A is launched out faster than B.

• B is in the air longer than A.

• A is in the air longer than B.

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What is projectile motion?

• Motion of an object in a straight line

• Motion of an object in a circular path

• Motion of an object in both x and y directions under gravity

• Motion of an object with constant speed

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A ball is thrown off a cliff horizontally at 15 m/s. How fast is the ball moving in the x-direction for points A, B, and C shown in the diagram?

• 10 m/s

• 15 m/s

• 20 m/s

• 25 m/s

A ball is thrown off a cliff horizontally at 15 m/s. How fast is the ball moving in the y-direction at point B, 1 second after being thrown?

• 0 m/s

• 10 m/s

• 20 m/s

• 30 m/s

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For which situation will the cannon ball be in the air the longest ,a 25-degree angle or a 35-degree angle?

• 25-degree angle

• 35-degree angle

What angle will give you the maximum range (horizontal displacement) on a projectile?

• 30

• 45

• 60

• 90

A ball is thrown horizontally from the roof of a building 75 m tall with a speed of 4.6 m/s. How much later does the ball hit the ground?

(for partial credit you may submit a picture of your work)

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How far from the building will the ball land if it is thrown horizontally with a speed of 4.6 m/s from a height of 75 m?

(for partial credit you may submit a picture of your work)

What is the speed of the ball just before it hits the ground?

(for partial credit you may submit a picture of your work)

Tags

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