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Chapter 2: Q1P (page 32)

Question: While driving a car at 90 km/hr , how far do you move while your eyes shut for during a hard sneeze?

Short Answer

Expert verified

Answer

The distance covered while eyes shut for 0.5 s during a hard sneeze is 13 m .

Step by step solution

01

Given data

The velocity of the car, v= 90 km/hr.

Time interval, ∆t=0.50s.

02

 Step 2: Understanding the velocity

The velocity of any object is the rate of change of displacement with time. It is a vector quantity.

The expression for the velocity is as follows:

v=∆x∆t (i)

Here, ∆x is the displacement, and ∆t is the time interval.

03

Determination of the distance traveled

Converting speed from km/hr to m/s,

.v=90kmh×1000mkm×1hr3600s=25m/s

From equation (i), the distance traveled is calculated as follows:

∆x=v×∆t=25m/s×0.5s=12.5m

Rounding to correct significant figures,

∆x≈13m

Thus, the distance traveled while the eyes are shut will be 13 m.

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