$F=-kx$

$\overrightarrow{F_{12}}$ = $\overrightarrow{F_{21}}$

$\overrightarrow{F\ }$ =m $\overrightarrow{a}$

$\overrightarrow{F}$ $=$ $\overrightarrow{E}$ $\cdot q$

Conduction

Convection

Transport

Radiation

When a force acts on an object.

When a force acts an object and the object moves perpendicularly to the direction of the force.

When a force acts an object and the object moves in a direction that is not perpendicular to the direction of the force.

When a force acts on an object, the object remains at rest.

1 J

0.5 J

2 J

2.5 J

greater than liquids

equal to gases

less than liquids

equal to liquids

The movement of the coconut falling from the tree

Movement of the ball on an inclined plane

Bus movement

Movement of the Moon around the Earth

4

3

2

1

Mass and position of the object relative to the ground.

Mass

The mass and velocity of the object.

Material of object

True

False