7H UNIT 3

One of the laws of motion states, "An object in motion stays in motion unless an unbalanced force acts upon it." On Earth, objects always seem to eventually come to a stop when more force is not being applied. What force is causing the objects to eventually stop moving?

• Mass

• Friction

• Weight

• Gravity

What is the net force and direction for the first diagram?

• 0N, no direction (forces are balanced)

• 5N, to the right

• 10N, to the left

• 15N, to the right

What is the net force and direction for the second diagram?

• 17N left (35N - 18N = 17N left; up and down forces are balanced)

• 17N right (35N - 18N = 17N right; up and down forces are balanced)

• 53N left (35N + 18N = 53N left; up and down forces are balanced)

• 0N (All forces are balanced)

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force and direction for the third diagram?

• 15N down (45N - 30N = 15N down)

• 75N up (45N + 30N = 75N up)

• 15N up (45N - 30N = 15N up)

• 30N down (45N - 15N = 30N down)

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force and direction of the force for ? Choose the correct answer from each drop-down to complete the statement.

• Upward
• Downward

• Leftward

• Rightward

Tags

NGSS.MS-PS2-2

Describe the forces below as an action or reaction force.

• Action Force

• Reaction Force

Tags

NGSS.MS-PS2-1

Describe the forces below as an action or reaction force.

• Action Force

• Reaction Force

Tags

NGSS.MS-PS2-1

A runner's foot pushes backward on the ground.

• Action Force

• Reaction Force

Tags

NGSS.MS-PS2-1

Describe the forces below as an action or reaction force.

• Action Force

• Reaction Force

Tags

NGSS.MS-PS2-1

Based on the observations and the calculations made by the students, what is the estimated force applied to the skateboarder if the acceleration is 0.9 m/s²?

• 36 N

• 18 N

• 54 N

• 9 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2