Question

Odd one out
1: Magnetic force, Gravitational force, Electrostatic force, Frictional force.
2: Force, Pressure, Buoyant Force, Gravitational force.
3: N/m^2, Pascal, Bar, m^2
4: Specific gravity, Relative density, Density, Density of substance/density of water.

Plz answer my question​

Answer 1

Answer:

1). electrostatic force

2). force

3). bar

4). specific gravity

Answer 2

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1. Magnetic force, Gravitational force, Electrostatic force, Frictional force

• Frictional Force

All other three are non-contact force or force-at-a-distance but frictional force is a contact force which means it is applied when two objects are in contact with each other.

2. Force, Pressure, Buoyant Force, Gravitational force.

• Pressure

Only force, Buoyant & Gravitational force are types of forces but pressure here is a different quantity. It is given by : Force / Area. So, it's the odd one out here.

3. N/m^2, Pascal, Bar, m^2

• m²

N/m², Pascal and Bar are the units of pressure because pressure is force per unit area. m² is the unit of area.

4. Specific gravity, Relative density, Density, Density of substance/density of water.

• Density

Relative density, Specific gravity and Density of substance / Density of water is the same thing expressed in different ways. But Density is the odd one out because it stands for a particular substance only. It is not comparing anything.