18-19 forces and motion

A speed that does not vary is called average speed

• true

• false

Acceleration is defined as the rate of change of a position

• true

• false

• need to study

The combination of all forces acting on an object is the net force

• true

• false

Tags

NGSS.MS-PS2-2

Velocity changes when the direction of motion changes

• true

• false

• need to study

The more mass an object has, the greater its inertia is

• False

• need to study

• true

Tags

NGSS.MS-PS2-2

Newtons third law says that an object in motion is slowed down by gravity

• turtle

• false

• true

• need to read better

Tags

NGSS.MS-PS2-4

Friction always act in a direction opposite of motion

• Turn

• true

• fantasy

• false

When you walk, you push on the sidewalk, and the sidewalk pushes you with equal force

• true

• false

• need to learn these laws

Tags

NGSS.MS-PS2-1

The relationship of force and acceleration of an object is explained using Newton's first law of motion

• Tristan

• True

• Fred

• False

A soccer ball takes 40s to roll 20 m. What is the average speed of the soccer ball? (HINT: s=d/t)

• 200 m/s

• 5 m/s

• 2 m/s

• 0.5 m/s

Tags

NGSS.MS-PS3-1