Projectile horizontally from Cliff

An object is thrown horizontally off a cliff with an initial velocity of 5.0 meters per second.  The object strikes the ground 3.0 seconds later.  How far from the base of the cliff will the object strike the ground? [Neglect friction.]

• 1. 2.9 m

• 1. 9.8 m

• 1. 15 m

• 2. 44 m

Tags

NGSS.MS-PS2-4

A 0.2-kilogram red ball is thrown horizontally at a speed of 4 meters per second from a height of 3 meters. A 0.4-kilogram green ball is thrown horizontally from the same height at a speed of 8 meters per second. Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground is

• 1. one-half as great

• 1. twice as great

• 1. the same

• 1. four times as great

A book is pushed with an initial horizontal velocity of 5.0 meters per second off the top of a desk.  What is the initial vertical velocity of the book?

• 5.0 m/s

• 0 m/s

• 14.9 m/s

• 1.0 m/s

Four different balls are thrown horizontally off the top of four cliffs.  In which diagram below does the ball have the shortest time of flight?

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Tags

NGSS.HS-PS2-4

A ball is projected horizontally to the right from a height of 50. meters, as shown in the diagram below.

Which diagram below best represents the position of the ball at 1.0-second intervals?  [Neglect air resistance.]

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Tags

NGSS.HS-PS2-1

The diagram shows a ball projected horizontally with an initial velocity of 20. meters per second east, off a cliff 100. meters high

• 1. downward

• 1. upward

• 2. westward

• 1. eastward

Tags

NGSS.HS-PS2-1

Base your answer to the question on the information and diagram.

A projectile is launched horizontally at a speed of 30. meters per second from a platform located a vertical distance h above the ground. The projectile strikes the ground after time t at horizontal distance d from the base of the platform. [Neglect friction.]

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Tags

NGSS.HS-PS2-1

An object was projected horizontally from a tall cliff. The diagram represents the path of the object, neglecting friction.

• 1. The magnitude of the vertical component of the object’s velocity at point A is greater than the magnitude of the vertical component of the object’s velocity at point B.

• The magnitude of the vertical component of the object’s velocity at point A is less than the magnitude of the vertical component of the object’s velocity at point B.

• 1. The magnitude of the vertical component of the object’s velocity at point A is the same as the magnitude of the vertical component of the object’s velocity at point B.

Tags

NGSS.HS-PS2-4

In the diagram, a 10.-kilogram sphere, A, is projected horizontally with a velocity of 30. meters per second due east from a height of 20. meters above level ground. At the same instant, a 20.-kilogram sphere, B , is projected horizontally with a velocity of 10. meters per second due west from a height of 80. meters above level ground. [Neglect air friction.] Initially, the spheres are separated by a horizontal distance of 100. meters. What is the horizontal separation of the spheres at the end of 1.5 seconds?

• 1. 15 m

• 30 m

• 40 m

• 45 m

The diagram below shows the muzzle of a cannon located 50. meters above the ground.  When the cannon is fired, a ball leaves the muzzle with an initial horizontal speed of 250. meters per second.  [Neglect air resistance.]

Which action would most likely increase the time of flight of a ball fired by the cannon?

• 1. pointing the muzzle of the cannon toward the ground

• 1. moving the cannon closer to the edge of a cliff

• positioning the cannon higher above the ground

• 1. giving the ball a greater initial horizontal velocity