Question

(2)
Choose the most appropriate statement.
(1) If acceleration and velocity are parallel,
then speed increases
(2) If acceleration and velocity are oppositely
directed, then speed decreases
3) If acceleration remains constant, speed
may increase
(4) All of above are correct​

Answer 1

Answer:

All the above are correct

Answer 2

Option 4) All of above are correct​

• As long as the trajectory has a horizontal component, velocity will be perpendicular to the arc, but the only acceleration is downward (due to gravity) and is never actually parallel to velocity.
• The velocity is decreasing if the acceleration is negative. Naturally, if the velocity is negative and dropping, its magnitude is growing, indicating that you are moving more quickly. Therefore, in this case, negative acceleration refers to moving left and accelerating.
• If the speed is rising, the car is accelerating positively. The car's speed drops as it slows down. Negative acceleration describes a speed reduction. The car is moving forward in both scenarios, but one acceleration is positive and the other is negative.
• Distance divided by time equals average speed. Speed in a specific direction is known as velocity. Change in velocity divided by time equals acceleration.
• Unless an object is travelling straight up or straight down, the vectors of velocity and acceleration will never be parallel.
• Yes, an item can accelerate up when its acceleration falls off. You need to grasp what acceleration means in order to comprehend the same. Theoretically, speed is the magnitude of the velocity whereas acceleration is the rate of change of velocity.

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