Magnitude and direction of acceleration

In summary, the problem involves a car with a mass of 1.3x10^4kg initially moving at 35 km/hr and coming to a stop at 15m. The question asks for the magnitude and direction of acceleration, the magnitude and direction of the braking force, and the time required to stop. To solve this problem, we need to use the SUVAT equations and the equation connecting acceleration with force. The proposed answer for part a) is incorrect as it is a speed, not an acceleration. The directions for both the acceleration and braking force also need to be specified. The spelling for "braking force" is also incorrect.
  • #1
AshleyAg
1
0

Homework Statement


A car with a mass of 1.3x10^4kg is initially moving at 35 km/hr in a straight line when the car comes to a complete stop at 15m. What is the magnitude and direction of acceleration?b) the magnitude and direction of the breaking force c) thetime required to stop

Homework Equations

The Attempt at a Solution


I got a) 20 m/s b) I didn't understand & c) I didn't understand eathier[/B]
 
Last edited:
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  • #2
Hi! You need to include an attempt at a solution, or we can't help you with the problem. Please edit your post and give us any attempts you've made. :smile:
 
  • #3
Technically, the question ought to state that acceleration is uniform. Do you know the SUVAT equations?

A) asks for the magnitude and direction of an acceleration. Your proposed answer is a speed. If you meant 20m/s2 then I don't think that is right (and you still have not specified a direction). Please post the equations you applied and show your working.

For b), what equation connects acceleration with force? (And it's braking force, not breaking force. Nothing gets broken in the process.)
 

FAQ: Magnitude and direction of acceleration

What is acceleration?

Acceleration refers to the rate of change of an object's velocity. It is a vector quantity, meaning it has both magnitude (size) and direction.

How is acceleration measured?

Acceleration is typically measured in units of meters per second squared (m/s²). This represents the change in velocity (in meters per second) over a certain amount of time (in seconds).

What is the difference between speed and acceleration?

Speed refers to the rate at which an object is moving, while acceleration refers to the rate at which an object's speed is changing. In other words, acceleration is the change in speed over time.

What is the formula for calculating acceleration?

The formula for acceleration is a = (v₂ - v₁) / t, where a is acceleration, v₂ is the final velocity, v₁ is the initial velocity, and t is the time interval.

How do you determine the direction of acceleration?

The direction of acceleration is determined by the direction in which an object's velocity is changing. If an object's velocity is increasing, the acceleration is in the same direction as the velocity. If an object's velocity is decreasing, the acceleration is in the opposite direction as the velocity.

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