Force and Motion

If the man and the ball travels 90 m in 9 seconds, what is their average speed?

• 10 m/s

• 180 m/s

• 99 m/s

• 10 meters

Tags

NGSS.MS-PS3-1

Examine the image of the forces acting on a cart. Which additional force can be applied to make the cart move in the opposite direction? (Think carefully about each option!!!)

• 60 N towards the west

• 40 N towards the west

• 40 N towards the east

• 60 N towards the east

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If a lizard can run 8 m across the water in 4 seconds, how fast is he traveling?

• 32 m/s

• 2 m/s

• 2 seconds

• 34 meters

Tags

NGSS.MS-PS3-1

A student walks along a sidewalk on his way to school. What is true about this scenario?

• The Earth exerts a greater force on the student than the student exerts on the Earth.

• The Earth exerts a force on the student, but the student exerts no force on the Earth.

• The Earth and the student both exert equal forces on each other.

• The Earth exerts no force on the student, but the student exerts a force on the Earth.

Tags

NGSS.MS-PS2-4

If Bob pushes a box north with 40 N of force and Bill helps by pulling the box north with 20 N of force, what is the net force acting on the box?

• 20 N

• 60 N

Tags

NGSS.MS-PS2-2

What will the net force on the soccer ball be?

• 50 N to the left

• 50 N to the right

• 200 N to the left

• 200 N to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student performs an investigation by following a procedure, as shown.

The student observes that the card quickly moves out from under the coin, and the coin falls into the cup rather than moving along with the card, as shown.

Which statement explains the observation?

• Inertia causes an object to fall to the ground.

• An object at rest has the tendency to remain at rest.

• Inertia causes an object to change its speed and direction.

• An object maintains its position regardless of the force applied to it.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If forces are in the same direction you add all forces together and if they are in opposite directions you will subtract the smaller force from the larger force.

• True

• False

Tags

NGSS.MS-PS2-2

Acceleration is the rate at which velocity changes.

• True

• False

Which of the following is NOT a way to reduce friction?

• sanding

• grease or oil

• increasing the texture