Motion Review

A place or object used for comparison to determine if another object is in motion is called a

• comparison point
• reference point
• point of view
• motion detector

Relative motion

• the motion of an object in comparison to other objects in a specific frame of reference

• the point of view used to measure the position and movement of objects

• how fast something moves

• the distance

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

Tags

NGSS.MS-PS3-1

A baseball pitcher is warming up as he travels to a game by plane. The plane is flying at 250 m/s North relative to the ground. The pitcher throws the ball at 50 m/s South relative to the airplane. What is the ball’s velocity relative to the ground, if the pitcher throws the ball towards the front of the plane? 

• 200 m/s South
• 200 m/s North
• 250 m/s South
• 250 m/s North

What has both size and direction?

• Victor
• Hector
• Vector
• Origin

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

the process of changing position

• motion
• reference point
• acceleration
• speed

Tags

NGSS.MS-PS2-2

Define distance

• direction from the starting point and the length of a line from the starting point to the ending point.

• length of a path between two points

• movement in relation to a frame of reference.

Define displacement

• direction from the starting point and the length of a line from the starting point to the ending point.

• length of a path between two points

• movement in relation to a frame of reference.

You travel 30 miles west of your home. You turn around and start back home. After traveling 10 miles east, what is your displacement from home?

• 40 miles west

• 20 miles east

• 20 miles

• 20 miles west

Which of the following describes distance and displacement correctly?

• The blue arrow shows distance and the orange arrows show displacement
• The blue arrow shows displacement and the orange arrows show distance
• Both arrows show distance only
• Both arrows show distance and displacement

Tags

CCSS.HSN.VM.A.3