Ch 11 and Ch 12

What does newtons first law states

• An object at rest will remain at rest unless a force is applied

• An object is moving

• An object has stopped

• An moving object will keep going when a force is applied to it

The tendency of objects to resist a change in motion is called:

• Friction

• Inertia

• Gravity

• Velocity

Which hits the ground first if they start at the same height: a dropped ball or a ball launched with a

horizontal velocity?

• the launched ball

• the dropped ball

• they both hit at the same time

An object of mass 10 kg is accelerated upward at 2 m/s². What force is required?

• 20 N

• 2 N

• 5 N

• 0 N

When force is 20 N, mass is 5 kg, what is acceleration?

F = ma

• 25 m/s^2

• 5 m/s^2

• 100 m/s^2

• 4 m/s^2

For every action, there is an equal and opposite reaction.

• Newton's
  1st
  Law of Motion
• Newton's
  2nd
  Law of Motion
• Newton's
  3rd
  Law of Motion

Describe the motion in the graph:

• Constant Speed (positive slope)

• Stopped (at rest)

• Acceleration (increasing speed)

• Return Home (negative slope)

Jane jogs 18 km in 2 hours. Then she walks for 6 km in 2 hours. Find her average speed.

• 9

• 3

• 12

• 6

• 1st
• 2nd
• 3rd

Segment A-B: The bus is __

• accelerating

• decelerating

• moving at constant speed

• at rest