Question

Can an object be accelerated if it is moving with constant speed if yes explain giving example 1 when do you say that an object has positive acceleration 2 when do you say that an object has negative acceleration

Answer 1

Answer:

Yes

Explanation:

Yes, a body can be accelerated if it's moving with constant speed.

To know how and why, we must have a clear knowledge about the acceleration, velocity and speed.

• Acceleration-- It can be defined as the rate of change of velocity.

(This change can either be of magnitude or direction of velocity)

• Velocity-- It can be defined as the rate of change of displacement with time.

• Speed -- It can be defined as the rate of change of distance with time.

Thus in velocity we must consider direction while in speed only magnitude. In other words we can say speed is the magnitude of velocity if direction is not considered.

Now,

Even if a body moves with constant speed, if it's direction is changing then according to the definition of acceleration, the body is accelerating.

• Example -- In a circular motion even if a body have constant speed. It's direction is changing thus it has acceleration.

1. When the acceleration of the body is in the same direction of the motion of the body then it's positive acceleration.

• When the acceleration of the body is in the opposite direction of the motion of the body then it's negative acceleration.

Answer 2

Explanation:

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