How Long Does It Take to Travel 144 km East at 48 km/h?

In summary, velocity is a vector quantity that measures an object's speed and direction of motion, while displacement measures the distance and direction of an object's movement. Velocity is calculated by dividing displacement by time, and is typically measured in units of meters per second or kilometers per hour. An object can have a velocity of zero and still be moving if it is changing direction or moving at a constant speed. Acceleration affects both velocity and displacement, as it is the rate of change of an object's velocity.
  • #1
QT
1
0
Question:
Simpson drives his car with an average velocity of 48.0 km/h to the east, How long will it take him to drive 144 km on a straight highway?


now i know you start out with the given which is :
Vavg= 48.0 km/h east
delta x= 144km
delta t= ?
so you have to find the delta t but i don't know how
 
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  • #2
Umm. Isn't this just a case of [tex] Speed = \frac {Distance} {time} [/tex]
:bugeye:

ie... re-arranging this equation.
 
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  • #3
But make sure to include direction, as velocity and displacement are vectors.

[tex]\vec{v}=\frac{{\triangle}\vec{d}}{\triangle{t}}[/tex]
 
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What is the difference between velocity and displacement?

Velocity is a vector quantity that describes the rate of change of an object's position with respect to time. Displacement is a vector quantity that describes the change in an object's position from its initial to final position. In other words, velocity measures the speed and direction of an object's motion, while displacement measures the distance and direction of its movement.

How is velocity calculated?

Velocity is calculated by dividing the change in an object's position (displacement) by the change in time. It is represented by the equation v = Δx/Δt, where v is velocity, Δx is change in position, and Δt is change in time.

What units are used to measure velocity and displacement?

Velocity is typically measured in meters per second (m/s) or kilometers per hour (km/h). Displacement is measured in units of length, such as meters (m) or kilometers (km).

Can an object have a velocity of zero and still be moving?

Yes, an object can have a velocity of zero and still be moving. This occurs when the object is changing direction or moving at a constant speed. For example, a car traveling around a circular track at a constant speed has a velocity of zero at the top and bottom of the track, but is still considered to be moving.

How does acceleration affect velocity and displacement?

Acceleration is the rate of change of an object's velocity with respect to time. If an object is accelerating, its velocity is changing and therefore its displacement is also changing. The direction of acceleration can also affect the direction of an object's velocity and displacement.

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