Motion Diagrams

Officials are looking into three different ski accidents. The accidents happened when three skiers (all with the same mass) were skiing across flat, snowy ground. They were each bumped by another skier, but not all from the same direction. These skiers changed speed as a result of being bumped. Which skier(s) experienced the strongest force when bumped?

• All of the skiers

• The red skier

• The yellow skier

• The purple skier

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the acceleration of the 1st paddle?

• 2 m/s²

• 4 m/s²

• 10g

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In which crash did the puck experience a stronger force?

• The puck didn't experience a force. Only the paddles experienced force.

• Crash 1: The force of the red paddle was stronger in this crash because it has less mass, so the force on the puck was stronger.

• Crash 2: The force of the purple paddle was stronger in this crash because it has more mass, so the force on the puck was stronger.

• The puck experienced the same force in both crashes.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the acceleration of the pickup truck?

• 2 m/s²

• 10 m/s²

• 8 m/s²

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In which crash did the tennis ball experience a stronger force?

• Crash 1: The force on the pink soccer ball was stronger so the force on the tennis ball was also stronger.

• Crash 2: The force on the blue soccer ball was stronger so the force on the tennis ball was also stronger.

• The force was the same in both crashes.

• The diagram doesn't tell you anything about the force on the tennis ball.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In which crash did the asteroid experience the stronger force?

• Crash 1: The force on the gray moon was stronger in this crash. So the force on the asteroid was stronger.

• Crash 2: The force on the planet was stronger in this crash. So the force on the asteroid was stronger.

• The diagram doesn't tell you anything about the force.

• The force was the same in both crashes.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Three boats were moving across the surface of a lake. The gray and pink boats are a greater mass than the orange boat. Each boat was bumped by another boat. Which boat experienced the strongest force when hit? How do you know?

• The gray and pink boats because they are more massive, and all boats changed velocity by same amount.

• The pink boat - it's as massive as the gray boat and has the highest ending speed.

• All three - they all changed speed by the same amount.

• The gray boat - it takes more force to slow down an object than it takes to make it go faster.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Three curling stones that have the same mass were sliding across the ice. They were each pushed by a player, but not all from the same direction. Each curling stone changed speed as a result of being hit. Which curling stone(s) experienced the strongest force when hit?

• The yellow and orange curling iron, because they sped up by the same amount.

• The blue curling iron had the strongest force

• All three - they all changed speed by the same amount.

• The orange curling iron had the strongest force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What does a motion diagram represent in physics?

• A sequence of images showing the position of an object at equal time intervals

• A graph showing the velocity of an object over time

• A chart showing the acceleration of an object at different points

• A table listing the forces acting on an object

Which of the following best describes the use of vectors in motion diagrams?

• Vectors represent the position of an object only

• Vectors represent both the position and velocity of an object

• Vectors represent the acceleration of an object only

• Vectors are not used in motion diagrams