2D Motion

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.MS-PS2-4

NGSS.MS-PS3-5

You get off the freeway going east at 90 km/h and slow to 45 km/h in 5 seconds, what is your acceleration?

• 9 km/h/s

• 8 km/h/s

• -9 km/h/s east

• -9 km/h/s west

Tags

NGSS.MS-PS2-2

A roller coaster travels 100 ft at an angle of 30◦ above the horizontal. How far does it move horizontally?

• 86.6 ft

• 50 ft

• 57.7 ft

• 100 ft

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Janet jumps horizontally off a 10m high diving platform with a horizontal velocity of 2 m/s. How far does she land away from the platform?

• 4.9 m

• 2.86 m

• 1.43 m

• 1.39 m

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-5

A hiker walks east for 3km, then turns 30 degrees to the north from east and walks another 5km to the DNR station.

What is the hikers displacement?

• 5.3 km @ 14 degrees E of N

• 7.7 km @ 18.8 degrees Nof E

• 6.0 km NE

• 2.6 km 18.1 degrees N of E

A car moved 60 km East and 90 km West. What is the displacement?

• 30 km, West

• 60 km. East

• 90 km

• 150 km

What is v_iy for a horizontal launch ALWAYS?

• 0 m/s

• -10 m/s

• 10 m/s

• Depends on v_x

A football is kicked into the air at an angle of 45 degrees with the horizontal. At the very top of the ball's path, its acceleration is _______.

• entirely vertical

• entirely horizontal

• zero

• both horizontal and vertical

Tags

NGSS.HS-PS2-1

A plane takes off at and angle of 5 degrees above horizontal with a speed of 300 km/h. If the plane travels for 15 minutes at that pace, how high will it be?

• 8.7 km above the ground

• 26.1 km above ground

• 6.5 km above the ground

• 17.4 km above ground

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The rate at which velocity changes.