& A car moving on a straight road covers a distance
of 1.5 km due east in 150 s. What is the speed of
the car? What is its velocity?
Ans. speed = 10 m/s, velocity = 10 m/s due east)
Answers
Answer:. Speed = 10m/s
Velocity = 10m/s
Explanation:
Given,
Distance = 1.5km
= 1.5 × 1000. ( 1km = 1000m )
= 1500m
Time = 150s
Therefore, A/q
Speed = Distance/Time
= 1500m/150s
= 10m/s
Now,
Velocity = Displacement/Time. ( Here Displacement = Distance )
= 1500m/150s
= 10m/s
Therefore, Speed = 10m/s
And Velocity = 10m/s
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Answer:
• Speed (s) of the car is 10 m/s.
• Velocity (v) of the car is 10 m/s due east.
Given:
1. Car covers a distance of 1.5 Km due east.
2. Time taken (t) = 150 seconds.
Explanation:
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Case-1
Firstly converting the Distance into meters.
⇒ 1 Km = 1000 m
⇒ 1.5 Km = 1.5 × 1000
= 1500 m
⇒ d = 1500 m.
From the formula we know,
⇒ Speed = Distance / time
Substituting the values,
⇒ s = 1500 / 150
⇒ s = 10
⇒ s = 10 m/s
∴ Speed (s) of the car is 10 m/s.
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Case-2
As the body is travelling in straight line path both distance & Displacement will be equal.
Firstly converting the Displacement into meters.
⇒ 1 Km = 1000 m
⇒ 1.5 Km = 1.5 × 1000
= 1500 m
⇒ D = 1500 m.
From the formula we know,
⇒ Velocity = Displacement / time
Substituting the values,
⇒ v = 1500 / 150
⇒ v = 10
⇒ v = 10 m/s
We Know that the velocity is a vector quantity i.e. has both Magnitude and direction. We got the magnitude, and the direction is due east in which the car is travelling.
⇒ v = 10 m/s due east
∴ Velocity (v) of the car is 10 m/s due east.
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