¿Explain why velocity is a vector?.... Question from @Silva1984

Silva1984 @Silva1984

October 2018 1 13 Report

¿Explain why velocity is a vector?

ac067575 Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. Speed is ignorant of direction. On the other hand, velocity is a vector quantity; it is direction-aware.

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I need to answer all that question give me the answer plese (with short answers) I. 1- Explain why velocity, but no speed, is a vector 2- Describe how to use a vector to represent the velocity of a moving object. 3- State the difference between velocity and acceleration 4-What happens to your body when in a moving car, it suddenly accelerates 5-What happens to your body when in a moving car, it suddenly decelerates 6- What is the formula to find acceleration given the time and distance of the object II. 1. A car accelerates from 5.0 m/s to 22 m/s in 18 seconds. a) Find the acceleration. b) Find the displacement travelled during that time. 2. How far does a cyclist travel when she accelerates from rest to 6.5 m/s in 22 s? 3. A child coasting on a bicycle slowly decelerates from 5.5 m/s to 2.4 m/s in 42 seconds. Determine the distance (displacement) he travels during that time. 4. A small aircraft, upon landing, can decelerate from 122 km/h to rest in 7.2 s. What length of runway does he need to come to a full stop? 5. A car initially travelling with a velocity of 8.0 m/s accelerates to 24 m/s in a distance (displacement) of 124 m. How long did it take to accelerate over this distance?

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