Question

Define acceleration and give its SI unit. When is acceleration of a body negative? Give two examples of situations in which acceleration of the body is negative.

Answer 1

Answer:

Acceleration is the rate of change of velocity of an object with respect to time. An object's acceleration is the net result of all forces acting on the object, as described by Newton's Second Law.The SI unit for acceleration is metre per second squared (m⋅s−2). The acceleration is in the opposite direction as the velocity. Thus, this object has a negative acceleration. For example the object is moving in the negative direction (i.e., has a negative velocity) and is speeding up.