2D Motion Review

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

A projectile is fired straight up with a velocity of +100 m/s. When the projectile returns to its starting position, its velocity 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)

Tags

NGSS.HS-PS2-4

When a rock thrown straight upward gets to the exact top of its path, the magnitude of its

• velocity is zero and its acceleration is zero.

• velocity is zero and its acceleration is about -10 m/s²

• velocity is about 10 m/s and its acceleration is zero.

• velocity is about 10 m/s and its acceleration is about -10 m/s².

Tags

NGSS.HS-PS2-1

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.

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.

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-PS2-1

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.

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.