1. What must be your cars average speed in order to travel 210km in 3.30 hours?

Question

1. What must be your cars average speed in order to travel 210km in 3.30 hours? 2. A bird can fly 24km/h. How long does it take to fly 15km? 3. If you are driving 108km/h along a straight road and you look to the side for 1.0s, how far do you travel during this inattentive period? 1. What must be your cars average speed in order to travel 210km in 3.30 hours? 2. A bird can fly 24km/h. How long does it take to fly 15km? 3. If you are driving 108km/h along a straight road and you look to the side for 1.0s, how far do you travel during this inattentive period? 2. A bird can fly 24km/h. How long does it take to fly 15km? 3. If you are driving 108km/h along a straight road and you look to the side for 1.0s, how far do you travel during this inattentive period?

Explanation / Answer

1.

The average speed is given by

vavg =210km/3.30hr =63.636km/hr

2.

A bird can fly 24km/h. How long does it take to fly 15km?

A fly takes 24 km in one hour(60*60s)

                15km in x

Then x =60*60s*15km/24km =2250s =37.5min =0.625hours

3.

Given that

v =108km/h =108*1000/3600s =30m/s

The distance is covered is

d =v*t =(30m/s)*(1.0s) =30m

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