Question

Define the term acceleration. What are positive and negative accelerations.​

Answer 1

In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities (in that they have magnitude and direction). The orientation of an object's acceleration is given by the orientation of the net force acting on that object

Explanation:

if the acceleration is increasing with the time then it is positive acceleration otherwise negative

Answer 2

Answer:-

• The rate of change of velocity at per unit time is called acceleration.

• SI unit of acceleration is m/s².

• It is vector Quantity that means it has Magnitude as well as direction.

• Negative acceleration is called retardation/deceleration.

Additional Information !!

Some equation of motion are

→ v = u +at

→ s = ut +1/2at².

→ v² = u² + 2as

Here,

v is the final velocity

u is the initial velocity

a is the acceleration

s is the displacement or Distance

t is the time taken

you can use this formula to finding the acceleration of a body.