class 6

Friction force acts when objects are

• rubbing

• far away

• not moving

• all of them

...........slows down the moving object and bring them at rest

• speed

• electricity

• friction

• meter

The unit of force is

• newton

• kilogram

• meter

• second

Roughness is a factor affecting...

• weight

• friction

• atom

• mass

Protons have ................charge

• a positive

• a negative

• no charge

Electrons have ...............charge

• a positive

• a negative

• no charge

• none of them

............are the building blocks of matter

• electrons

• protons

• neutrons

• atoms

When the atom has more negative charges than positive charges is called

• positively charged

• negatively charged

• neutral charged

When the atom has less negative charges than positive charges is called

• positively charged

• negativelycharged

• neutral charged

.............is the center of the atom

• charge

• atom

• electron

• nucleus