Frames of Reference

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

30 m/sec, East. Scalar or Vector

• Scalar
• Vector
• Neither

Tags

CCSS.HSN.VM.A.1

A passenger at the rear of a train traveling at 15 m/s relative to Earth throws a baseball with a speed of 15 m/s in the direction opposite the motion of the train.

What is the velocity of the baseball relative to Earth as it leaves the thrower’s hand?

• 30 m/s

• 15 m/s

• 0 m/s

• 20 m/s

If a car passes you going 90 km/hr north while you are driving 80 km/hr north, how far is the car moving relative to your car

• 170 km/hr N

• 170 km/hr S

• 10 km/hr S

• 10 km/hr N

A spy runs from the front to the back of a ship at a speed of 3.0 m/s. If the ship is moving forward at 18.0 m/s, how fast does the spy appear to

be running when viewed by someone watching from the shore?

• 14.5 km/hr

• 15.0 m/s

• 21.0 m/s

• 63 m/s

When you're in a car, what is your frame of reference?

• the car

• the road

• the Earth

• there is none

What is the motion of the car relative to the runner's frame of reference?

• 26 m/s right

• 34 m/s right

• 34 m/s left

• 26 m/s left

What is the motion of the plane relative to the hot air balloon's frame of reference?

• 493 m/s left

• 487 m/s left

• 493 m/s right

• 487 m/s right

What is the relative motion of the hitch hiker relative to the plane's frame of reference?

• 490 m/s right

• 0 m/s

• 490 m/s left

What is the relative motion of the canoe from the car's frame of reference?

• 28 m/s left

• 32 m/s left

• 28 m/s right

• 32 m/s right