Mistar 6.4 Forces

Force is a

• A push or a pull

• A force of attraction between objects that pulls objects towards each other.

• A force that works against motion between two surfaces that are in contact.

• A contact force of friction that opposes the motion of objects moving in the air.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Gravity is the

• A push or a pull

• A force of attraction between objects that pulls objects towards each other.

• A force that works against motion between two surfaces that are in contact.

• A contact force of friction that opposes the motion of objects moving in the air.

Tags

NGSS.MS-PS2-4

Friction is the

• A push or a pull

• A force of attraction between objects that pulls objects towards each other.

• A force that works against motion between two surfaces that are in contact.

• A contact force of friction that opposes the motion of objects moving in the air.

Tags

NGSS.3-PS2-1

Air resistance is the

• A push or a pull

• A force of attraction between objects that pulls objects towards each other.

• A force that works against motion between two surfaces that are in contact.

• A contact force of friction that opposes the motion of objects moving in the air.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Magnetism is a

• A push or a pull

• A force of attraction between objects that pulls objects towards each other.

• an invisible force or field caused by the unique properties of certain materials that can attract or repel metals

• A contact force of friction that opposes the motion of objects moving in the air.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Balanced forces is

• Equal forces acting on an object in opposite directions and do not cause a change in motion.

• A force of attraction between objects that pulls objects towards each other.

• an invisible force or field caused by the unique properties of certain materials that can attract or repel metals

• A contact force of friction that opposes the motion of objects moving in the air.

Tags

NGSS.MS-PS2-2

Unbalanced forces is

• Equal forces acting on an object in opposite directions and do not cause a change in motion.

• A force of attraction between objects that pulls objects towards each other.

• Forces that are unequal in size or direction and that change an object's motion.

• A contact force of friction that opposes the motion of objects moving in the air.

Tags

NGSS.MS-PS2-2

A student compares the amount of force used by his classmates to push a toy car down a ramp. What would be the best way to compare this force?

• measure the distance each time the car comes to a stop

• measure the amount of time it takes the car to travel down the ramp

• measure the distance the car travels with each push

• measure the amount of time it takes for the car to come to a stop

Tags

NGSS.MS-PS2-2

During an investigation on energy, Seth rolls marbles of four different masses down a ramp.

Which size marble will have the greatest kinetic energy when it reaches the bottom of the ramp?

• 2 grams

• 3 grams

• 5 grams

• 6 grams

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Dan throws a ball in the air. The ball comes back to the ground because

• the wind pushes on the ball with friction

• the mass of Earth creates a pull of gravity on the ball

• the core of Earth pulls on the ball with a magnetic attraction

• the weight of the atmosphere pushes down on the ball

Tags

NGSS.MS-PS2-4