Explanation

The work done on an object is calculated as the product of the force applied and the distance over which the force is applied:

Work = Force x Distance

= 6 N x 2 m

= 12 J

So, the work done is 12 Joule.

Explanation

A burning candle is an example of all three states of matter:

• Solid: The wax is in a solid state.
• Liquid: The melted wax is in a liquid state.
• Gas: The vaporized wax and combustion products are in a gaseous state.

Explanation

• Your weight, as measured on Earth, will be decreased if you move to a planet or moon with a weaker gravitational field.
• Weight is the force exerted on an object by gravity.
• It depends on both the mass of the object and the strength of the gravitational field.

Explanation

The stability of a racing car is increased by lowering its center of gravity, which reduces the risk of rollover or loss of control.

This can be achieved through design elements like a lower ride height, a wider stance, or a lower seating position for the driver.

Explanation

• KARI (Korea Aerospace Research Institute) is the space agency of South Korea.
• KARI was established in 1989.
• It is responsible for the development of spacecraft, launch vehicles, and satellites.

Explanation

Convex lenses are also known as converging lenses since the rays converge after falling on the convex lens.

The concave lens are known as diverging lenses, as the rays diverge after falling on the concave lens.

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RY24012023

Explanation

When light shines on a photovoltaic (PV) cell – also called a solar cell – that light may be reflected, absorbed, or pass right through the cell.

The PV cell is composed of semiconductor material; the “semi” means that it can conduct electricity better than an insulator but not as well as a good conductor like a metal.

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RY24012023

Explanation

A magnitude that has zero magnitude is called a zero vector or null vector.

This type of vector has a magnitude of zero, and its direction is considered arbitrary or indeterminate. 

Explanation

 When a body moves against the force of friction on a horizontal plane, the work done by the body is negative.

This is because work is defined as the dot product of force and displacement,

And when moving against friction, the force of friction acts in the opposite direction to the displacement of the body,

Resulting in an angle of 180 degrees between them. 

Explanation

 Energy = Power × Time = 40 W × 3600 s = 144000 J