Question

at what situations accelaration becomes possitive ,negative or zero

Answer 1

Answer:acceleration get positive when it is in support of motion and continuously speeding up

It is negative when you oppose the motion or apply brakes

It is 0 when the body is at rest or going with uniform velocity

Hope this helps you if please consider me brainliest

Answer 2

$\large \underline{\red{\mathbb{ANSWER}}}$

➾ What is Acceleration ?

➛ Acceleration is defined as rate of change of velocity. It means change in velocity in a time interval. Acceleration is a vector quantity. SI unit of acceleration is m/s².

ㅤㅤㅤㅤㅤ$\large{\boxed{\sf{a \: = \: \dfrac{v \: - \: u}{t}}}}$

Where,

• v is final velocity.
• u is initial velocity.
• t is time interval.

Let's move ahead to the question.

• Acceleration can be zero when object is moving with uniform velocity, or object is at rest.

• Acceleration is positive when object changes it's velocity, and it doesn't comes to rest at final position.

• Acceleration can be negative when object stops after applying breaks. Negative acceleration is known as retardation.