FPSC MCQs

Gravity attracts masses toward one another.
Near Earth, it pulls objects toward the ground.

Density compares mass with the space occupied.
It is calculated as mass divided by volume.

Gravity continuously accelerates the ball downward.
After slowing to a stop, it begins falling.

Ice has an open crystal structure that occupies more volume.
Its lower density causes it to float on water.

Friction resists sliding or rolling between surfaces.
It can produce heat and slow moving objects.

Freezing expands water into a less dense solid structure.
The resulting ice is buoyant in liquid water.

Grooves help tyres maintain contact with the road.
They also channel water away and reduce skidding.

A raised object has energy because of its position in a gravitational field.
This energy can convert to kinetic energy as it falls.

Oil forms a lubricating layer between moving surfaces.
This reduces friction, wear, and overheating.

The metre is the SI base unit of length.
It is used to measure distance and dimensions.

The kilogram is the SI base unit of mass.
Mass measures the amount of matter in an object.

The second is the SI base unit of time.
Larger time units are derived from it.