Relative Velocity and Vectors

What is speed of the walker in respect to the observer?

• 40 mph

• 50 mph

• 10 mph

• 30 mph

The president’s airplane, Air Force One, flies at 250 m/s to the east (compared to the ground). The president visits the pilots in the cockpit. Then he walks to the back of the plane at 1 m/s. What is his speed relative to the ground?

• 249 m/s

• 251 m/s

• 253 m/s

• 248 m/s

Tags

NGSS.HS-PS2-1

A boat with a speed of 4 m/s will cross a 40 m wide river that has a current of 3 m/s. The boat aims directly across the river. How long will it take the boat to cross the river?

• 10 s

• 20 s

• 30 s

• 40 2

Tags

NGSS.MS-PS2-2

Observers using different ___________________ may measure different velocities for an object in motion

• frame of reference

• relatives of motion

• projectile motions

• constant velocity

What is the y component of the vector given in the diagram?

• 77N
• 92N
• 120N
• 60N

Tags

CCSS.HSN.VM.A.2

What is the x component of the vector given in the diagram?

• 77N
• 92N
• 120N
• 60N

Tags

CCSS.HSN.VM.A.2

Find the component form of the vector. Round to three decimals.

• <16.116, 7.798>
• <16.298, 7.335>
• <16.892, 7.530>
• <16.314, 7.607>

Tags

CCSS.HSN.VM.A.2

What is the net force?

• 40 N left
• 0 N Balalnced
• 400 N right
• 40 N right

Tags

NGSS.HS-PS2-1

How fast does the plane appear to be moving to a person riding in the car?

• 520 m/s
• 460 m/s
• 30 m/s
• 490 m/s

Tags

NGSS.HS-PS2-1

A clown fish is swimming at 8 m/s, a sea anemone is standing still. What is the magnitude of velocity of the sea anemone relative to the clown fish?

• 8 m/s

• 16 m/s

• 4 m/s

• 0 m/s