Chap 4 Mass, Weight and Density

Question 1

Define mass

Answer 1

Mass is a measure of the amount of matter or substance in a body.

Question 2

What is the SI unit of mass?

Answer 2

The SI unit of mass is the kilogram(kg).

Question 3

What is gravitational field?

Answer 3

The Earth’s gravity is experienced by any object near it. The region surrounding the Earth where gravity is experienced is called the gravitational field. The force experienced is strongest on the surface of the earth and gets weaker further away.

Question 4

What is gravitational field strength?

Answer 4

Gravitational field strength (g) is defined as the gravitational force acting per unit mass on an object.

Question 5

How do you measure weight?

Answer 5

Common weighing instruments such as electronic balance and spring balance.

Question 6

How is mass measured?

Answer 6

Mass is measured using the beam balance.

Question 7

What is gravitational pull?

Answer 7

Gravitational pull is the gravitational force acting on an object.

Question 8

Define inertia

Answer 8

Inertia of an object refers to the reluctance of the object to change its state of motion. The inertia of an object depends on its mass. The greater the mass, the higher the inertia.

Question 9

What is the SI unit of density?

Answer 9

The SI unit of density is kilogram per cubic meter (kgm^-3).