2D Motion

A rock is thrown off a cliff with a horizontal velocity of 11 m/s. If the cliff is 58 meters high, how long does it take for the rock to hit the ground?

• 2.97 seconds

• 5.27 seconds

• 11.83 seconds

• 3.44 seconds

Tags

NGSS.HS-PS2-4

A rock is thrown off a cliff with a horizontal velocity of 11 m/s. If it takes 4 seconds to hit the ground, how far does the rock land from the base of the cliff?

• 2.75 meters

• 0.82 meters

• 44 meters

• 78.4 meters

Two spheres of equal mass, A and B, are rolled off the edge of a 2.0 m high bench. Sphere A has a horizontal velocity of 5.0 m/s and sphere B has a horizontal velocity of 2.5 m/s.

Which ball will be in the air for the greater amount of time?

• Ball A

• Ball B.

• They will be in the air for the same amount of time.

• here is not enough information to decide.

Tags

NGSS.MS-PS2-4

Two spheres A & B are rolled off the edge of a 2.0 m high table with the same horizontal velocity. Sphere A has a mass of 10 g and sphere B has a mass of 5 g.

Which ball will be in the air for the greater amount of time?

• Ball A

• Ball B.

• They will be in the air for the same amount of time.

• here is not enough information to decide.

Tags

NGSS.MS-PS2-4

Two spheres A & B are rolled off the edge of a 2.0 m high table with the same horizontal velocity. Sphere A has a mass of 10 g and sphere B has a mass of 5 g.

Ball A hits the floor at the spot marked X. Where will ball B hit the floor?

• at some point between the edge of the table and X.

• at the same distance from the table as X.

• at some point past X.

• There is not enough information to decide.

Tags

NGSS.HS-PS2-2

The force that keeps objects in circular motion is called__________

• Centripetal

• Centrifugal

• Tangential

• Fictitious

If a freely falling object were somehow equipped with an odometer to measure the distance it travels, then the distance it travels each succeeding second would be

• the same.

• less than the previous second.

• greater than the previous second.

• The distance cannot be predicted.

If a freely falling object were somehow equipped with a speedometer, how much would its speed (in m/s) increase each second? (Type only the numerical value. NO UNITS or OTHER TEXT)

Tags

NGSS.HS-PS2-1

A projectile is launched straight upwards at +125 m/s. Three seconds later, its velocity (in m/s) is...? Type the numerical value preceded by a + (for upward motion) or - (for downward motion) For example +50 or -60. NO UNITS or OTHER TEXT)

Starting from rest, a freely-falling object will fall, in 10 seconds, a distance of about.

• 10 m.

• 50 m.

• 100 m.

• 500 m.

• more than 500 m.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4