Can a body have zero velocity and finite acceleration?
This acceleration is the gravitational acceleration. At that point the component of acceleration/gravitational acceleration works there. So, at the topmost point the velocity is zero but acceleration is not and has a finite value. Therefore, a body can have zero velocity and finite acceleration.
Is it possible for a body moving on a circular track to have zero acceleration?
It is possible to move on a curved path with zero acceleration.
Can the direction of velocity of a body change when its acceleration is constant?
1-Yes ,the direction of velocity can change while experiencing a constant acceleration. Like, in uniform circular motion there is a change in direction of the velocity and acceleration is constant in this case.
Can the direction of body change when acceleration is uniform?
yes when a body is in uniform circular motion the direction changes at every point so does the velocity but the acceleration remains constant.
What is the angle between the direction of velocity and acceleration at the highest point?
90∘
Can direction of velocity and acceleration be different?
Since velocity is a vector, it can change either in magnitude or in direction. Acceleration is therefore a change in either speed or direction, or both. Keep in mind that although acceleration is in the direction of the change in velocity, it is not always in the direction of motion.
What is the direction of velocity in a circular motion?
We will see that unlike linear motion, where velocity and acceleration are directed along the line of motion, in circular motion the direction of velocity is always tangent to the circle. This means that as the object moves in a circle, the direction of the velocity is always changing.
Does velocity have a direction?
The direction of the velocity vector is simply the same as the direction that an object is moving. Note that speed has no direction (it is a scalar) and the velocity at any instant is simply the speed value with a direction.
Is speed equal to velocity?
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement.
What is the difference between speed velocity and acceleration?
Speed is the rate of change of distance(basically how much distance(m) has been covered in a particular time(s)). Velocity is the rate of change of displacement( change of distance in a particular direction with respect to time) , and acceleration is the rate of change of velocity per unit of time.
How do you convert acceleration to speed?
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).
Is acceleration due to gravity always negative?
Towards the center of the Earth, the gravity is defined to the be negative. At all points on the trajectory of a projectile, the gravitational acceleration points in the same direction, which is downwards toward the center of the Earth. So, the sign for the gravitational acceleration is always negative.
Is acceleration due to gravity constant?
The acceleration due to gravity, usually written as g, is a measure of how fast a free-falling object will accelerate when dropped near the surface of the Earth. It is more or less constant everywhere on Earth.
Where is acceleration due to gravity is zero?
Now, this attraction is towards the center of the Earth. That is, the Earth tries to pull everything towards its center. So, when the body is at the center there is no need to pull it towards the center anymore. So, acceleration due to gravity is zero at the center of the Earth.