ESAT ESAT Physics 2

Question 1

What does the area under a velocity-time graph represent?

Accepted Answer

Displacement

Answer

The area under a v-t graph gives displacement, since displacement = velocity × time.

Question 2

Which law states that the total momentum of a closed system remains constant?

Accepted Answer

Conservation of momentum

Answer

The law of conservation of momentum states that total momentum is constant in the absence of external forces.

Question 3

What is the gravitational potential energy of a 5 kg mass at a height of 10 m? (g = 10 m/s²)

Accepted Answer

500 J

Answer

GPE = mgh = 5 × 10 × 10 = 500 J.

Question 4

In ESAT Physics, what does Coulomb's law describe?

Accepted Answer

The force between two point charges

Answer

Coulomb's law gives the electrostatic force F = kq₁q₂/r² between two point charges.

Question 5

What is the relationship between pressure, force, and area?

Accepted Answer

P = F/A

Answer

Pressure is defined as force per unit area: P = F/A.

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