There is a tendency to believe that if an object is moving at constant speed then
it has no acceleration
. This is indeed true in the case of an object moving along a straight line path. On the other hand, a particle moving on a curved path is accelerating whether the speed is changing or not.
Can a particle with constant speed be accelerating?
A particle with constant speed can be accelerating,
if its direction is changing
. … However, a particle with constant velocity cannot be accelerating — its acceleration must be zero. It has both constant speed and constant direction.
Does a particle moving in a straight line with constant speed have acceleration?
There is a tendency to believe that if an object is moving
at constant speed then it has no acceleration
. This is indeed true in the case of an object moving along a straight line path. On the other hand, a particle moving on a curved path is accelerating whether the speed is changing or not.
Do straight lines have acceleration?
when two curves coincide, the two objects have the same velocity at that time.
straight lines imply uniform acceleration
. curved lines imply non-uniform acceleration . an object undergoing constant acceleration traces a straight line.
When a particle moves with constant speed its acceleration is?
If the velocity of a particle moving in a straight line changes uniformly (at a constant rate of change) from 5 m/s to 2 m/s over one second, its constant acceleration is
−3 m/s2
.
Is velocity and acceleration always in the same direction?
The acceleration points in
the same direction as the velocity if the car is speeding up
, and in the opposite direction if the car is slowing down.
Why doesn’t a heavy object accelerate more than a light object when both are freely falling?
Why doesn’t a heavy object accelerate more than a lighter object when both are freely falling? o
Because the greater mass offsets the equally greater force
; whereas force tends to accelerate things, mass tends to resist acceleration.
What is the acceleration of a straight line?
If the equation of the motion is linear, then the velocity is constant and if velocity is constant, then acceleration is
zero
.
How do you find the acceleration of a straight line?
- Use the first equation of motion, v=u+at. …
- Use the first equation of motion again, with u=30 and v=80: 80=30+52t.
What does it mean when acceleration is constant?
Sometimes an accelerating object will change its velocity by the same amount each second
. … This is referred to as a constant acceleration since the velocity is changing by a constant amount each second.
Is tangential acceleration constant?
In the case of the uniform circular motion, the speed (v) of the particle in uniform circular motion is constant (by definition). This implies that
tangential acceleration, aT, is zero
.
Is it possible that a body moving with constant acceleration but with zero velocity?
(a) An object with a constant acceleration but with zero velocity. Change in velocity is known as acceleration. … Since, the change in velocity is acceleration, as the velocity changes acceleration is produced. Hence, we can say that an object moves with acceleration and constant speed in a uniform circular motion.
Is the acceleration constant in uniform circular motion?
In uniform circular motion, the direction of the velocity changes constantly, so
there is always an associated acceleration
, even though the speed might be constant. … Acceleration is in the direction of the change in velocity, which points directly toward the center of rotation—the center of the circular path.
What is the acceleration of the body that increases in velocity?
The acceleration of the body that increases in velocity is
6.67 m/s2
.
What is an example of a negative acceleration?
Some examples of negative acceleration from our daily lives are: (1)
If we throw a ball with some initial velocity towards the sky, then the body goes up and attains a particular height and there it stops for a while and then comes back to the earth
.
Is acceleration always in the direction of force?
The acceleration is
directed towards the center of the circle
. As we know from Newton’s laws, objects which are accelerating are experiencing a net force. While the net force may not be in the same direction which the object is moving, it is always in the direction that the object is accelerating.
