8.6A & 8.6B

Which of the following vocab words help identify acceleration?

• velocity & time

• distance & time

• velocity & distance

• all of the above

Answer explanation

Velocity is distance and time plus a direction.

Acceleration is the change of direction or speed.

Distance and time alone doesn't show acceleration

Match the following Net forces & direction of movement

• 20N left

• 25N left

  25N left

  30N right

• 50N up

• 300N left

  300N right

• 900N right

• 700N right

  200N right

• 0N

• 100N up

  50N down

• 10N down

• 15N up

  25N down

  15N right

  15N left

Answer explanation

Remember opposite direction subtract.

Same direction add.

Strongest force wins the direction.

Tags

NGSS.MS-PS2-2

If a flower and a marble are dropped from the same height, what force will cause the flower to fall more slowly?

• inertia

• friction

• motion

• newton

Answer explanation

Check the definition of friction.

A change in

​ (a)  

is defined as ​ (b)   .

• position
• motion
• inertia
• acceleration

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Below are examples of

24 m/s eatwest

55 km/m north

Tags

NGSS.MS-PS3-1

If a car is moving in a straight line at a constant speed is the car subjected to balanced forces?

• True

• False

​ (a)   oppose the direction of movement.

• Friction
• mass
• force
• gravity

Tags

NGSS.MS-PS2-2

The arrows in the diagram below represent equal forces acting on balls that are resting on a table.

Which ball will accelerate if the forces are applied?

• Ball 1

• Ball 2

• Ball 3

• Ball 4

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1