A particle is moving with a velocity of 60.0 m/s

In summary, velocity is a measure of an object's speed and direction of motion. It differs from speed in that it includes information about direction. Velocity is calculated by dividing the change in an object's position by the change in time, and a velocity of 60.0 m/s means the object is moving at a speed of 60.0 meters per second in a specific direction. Velocity can change over time if there are changes in the object's speed or direction of motion.
  • #1
r-soy
172
1
A particle is moving with a velocity of 60.0 m/s in positive x direction at t= 0 and t = 15.0 s the velcity decreases uniformly to zero . What was the acceleration during this 15.0-s interval ? what is the significance of the sign of your answer ?





my answer is



Vo = 0

a = 60 - 0 / 15 = 4
 
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  • #2
Hi r-soy! :smile:

You must get into the habit of writing the formula clearly on one line, then filling in the numbers on the next line …

if you'd done that, you wouldn't have got the wrong answer! :redface:

So try again, and start with the full formula. :smile:
 

1. What is the definition of velocity?

Velocity is a measure of an object's speed and direction of motion. It is a vector quantity, meaning it has both magnitude (numerical value) and direction.

2. How is velocity different from speed?

Velocity includes information about an object's direction, while speed only measures how fast an object is moving regardless of direction.

3. How is velocity calculated?

Velocity is calculated by dividing the change in an object's position by the change in time. In other words, it is the displacement (change in position) divided by the time it takes to travel that distance.

4. What does a velocity of 60.0 m/s mean?

A velocity of 60.0 m/s means that the object is moving at a speed of 60.0 meters per second in a specific direction. The direction can be determined by the object's position in relation to a reference point.

5. Can velocity change over time?

Yes, velocity can change over time if the object's speed or direction of motion changes. This can occur due to forces acting on the object, such as acceleration or deceleration, or changes in the object's surroundings.

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