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nika2105 [10]
3 years ago
11

A car travels 2.5 hours in a northernly direction for 300 km. determine the cars speed and velocity.

Physics
1 answer:
wolverine [178]3 years ago
5 0

Answer:

Speed= 120 km/h

Velocity= 120 Km/h North

Explanation:

Time= 2.5 hours

Distance= 300 Km

Direction= North

Speed= distance/speed

Velocity= speed and direction

Substituting 300 km for speed and 2.5 hours for time then speed= 300/2.5= 120 km/h

The velocity= 120 km/h North

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Car A (1750 kg) is travelling due south and car B (1450 kg) is travelling due east. They reach the same intersection at the same
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Consider the east-west direction along x-axis and north-south direction along y-axis. In unit vector notation, velocities can be given as

\underset{V_{A}}{\rightarrow} = velocity of car A before collision = 0 i - V_{A} j

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M_{B} = mass of car B = 1450 kg

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(1450) V_{B} i - (1750) V_{A} j = 97600 i - 60160 j

Comparing the coefficient of "i" and "j" both side

(1450) V_{B} = 97600    and - (1750) V_{A} = - 60160

V_{B} = 67.3 km/h        and  V_{A} = 34.4 km/



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