Fireworks change electrical energy to sound and light energy

Data:

Ep = ? (Joule)

if: F = k.x → F = 10 N

x (displacement) = 0.20 m

Formula:

Solving:

**Question↓**

**Which of the following is required for a liquid to become a solid?**

**Answer↓**

an increase in kinetic energy Is The Answer

Particles in the liquid state move faster than particles in the solid state. Therefore, they have more kinetic energy.

xXxAnimexXx

have a great day!!! ^ω^

**Answer:**

The correct option is

a. v =

**Explanation:**

Time at which the object start fall t = 0

The acceleration a is given by a = g - bV

Where V = Speed of the object

Speed V² = u² + 2·a·h

However with the drag force the object will approach terminal velocity as t becomes progressively larger whereby v will stop increasing

Option a. is the only option that has limiting value of v which is in the range of g as t increases ∴ option a. is the correct option.

v = as t increases → 1 s and v→ g/b m/s