The **distance travelled **by the object during the **first 4 seconds** is **80 m**

<h3>Definition of speed </h3>

**Speed** is defined as the **distance travelled **per unit **time**. Mathematically, it can be expressed as:

**Speed = distance / time **

With the **above formula,** we can obtain the **distance travelled **by the object in the **first 4 seconds. **

<h3>How to determine the distance travelled </h3>

**Speed = distance / time**

20 = distance / 4

Cross multiply

Distance = 20 × 4

**Distance = 80 m **

**Complete question:**

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Learn more about **speed**:

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Direct current (DC) is the flow of electric charge in only one direction. It is the steady state of a constant-voltage circuit. Most well-known applications, however, use a time-varying voltage source. Alternating current (AC) is the flow of electric charge that periodically reverses direction.

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**<em>#</em>****<em>L</em>****<em>E</em>****<em>T</em>****<em>S</em>****<em> </em>****<em>STUDY</em>**</h2>

**Answer:**

66.2 sec

**Explanation:**

C₁ = 1.0 F

C₂ = 1.0 F

ΔV = Potential difference across the capacitor = 6.0 V

C = parallel combination of capacitors

Parallel combination of capacitors is given as

C = C₁ + C₂

C = 1.0 + 1.0

C = 2.0 F

R = resistance = 33 Ω

Time constant is given as

T = RC

T = 33 x 2

T = 66 sec

V₀ = initial potential difference across the combination = 6.0 Volts

V = final potential difference = 2.2 volts

Using the equation

t = 66.2 sec

**Explanation:**

Given:

v₀ = 0 m/s

v = 49 m/s

a = 9.8 m/s²

Find: t

v = at + v₀

49 m/s = (9.8 m/s²) t + 0 m/s

t = 5 s