Negative acceleration of a car

In summary, the problem involves a car traveling at a constant speed of 27.2 m/s in the negative direction. During a 3.90-second interval, the car's speed changes to a final speed of (a) 39.0 m/s and (b) 15.4 m/s. The acceleration (magnitude and algebraic sign) needs to be determined for each case. The solution involves using kinematic equations of motion for constant acceleration. The equation used to find the acceleration is a=(vf-vi)/t, where vf is the final velocity, vi is the initial velocity, and t is the time interval. For answer A, the calculation is (39.0-27.2)/3.90
  • #1
ginteeg
1
0
Cant seem to come up with the answer for portion BA car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 27.2 m/s, and during a 3.90-second interval, it changes to a final speed of (a)39.0 m/s and (b)15.4 m/s. In each case, find the acceleration (magnitude and algebraic sign).

Answer A=-3.03 units m/s
Answer B=Answer A was 39.0ms-27.2ms/3.9ms=-3.03
Also how would you get the answer what would be the steps to solving it.

Thanks so much!
 
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  • #2
Use the kinematic equations of motion for constant acceleration. Please list your relevant equations and show an attempt at a solution for additional help.
 

1. What is negative acceleration of a car?

Negative acceleration, also known as deceleration, is the decrease in the velocity of a car over time. This occurs when the car is slowing down or coming to a stop.

2. What causes negative acceleration in a car?

Negative acceleration can be caused by various factors such as applying the brakes, encountering friction from the road, or air resistance. It is also affected by the weight and speed of the car.

3. How is negative acceleration measured?

Negative acceleration is measured in meters per second squared (m/s²) in the metric system and feet per second squared (ft/s²) in the imperial system. It can be calculated by dividing the change in velocity by the change in time.

4. What is the difference between negative acceleration and positive acceleration?

Negative acceleration refers to a decrease in velocity, while positive acceleration refers to an increase in velocity. Negative acceleration is also known as deceleration, while positive acceleration is commonly referred to as acceleration.

5. How does negative acceleration affect a car's motion?

Negative acceleration can significantly impact a car's motion by slowing it down and causing it to come to a stop. It also affects the car's handling and stability, making it important for drivers to anticipate and control negative acceleration while driving.

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