Can a body have zero velocity and still acceleration give example?
Yes, a body with a velocity 0 can still accelerate. The simplest example is a body which is thrown up. At the peak point its velocity becomes 0 but still accelerates due to gravity.
How can you have acceleration but no velocity?
Since acceleration is the change in velocity over time, there has to be a change in velocity for something to accelerate. Although at an instant in time it is possible to have zero velocity whilst accelerating. For example, if you drop an object at the instant you release it it has zero velocity but it is accelerating.
Can a body have acceleration without change in magnitude of velocity?
Can a body have acceleration without change in magnitude of velocity ? So yes, a body can have acceleration even if it has constant magnitude.In this case the direction of motion may change. Ex circular motion ,the direction continuously changes.It is accelerated motion even if the speed is constant.
What does acceleration look like on a velocity time graph?
In a velocity-time graph, acceleration is represented by the slope, or steepness, of the graph line. If the line slopes upward, like the line between 0 and 4 seconds in the Figure above, velocity is increasing, so acceleration is positive.
Which conditions describe a box with zero acceleration?
If there is no acceleration then the net force is zero. In the situation you describe, where the box has no acceleration, there must be another force balancing Fapp otherwise there will be an acceleration.
Can a body move with a certain velocity but its acceleration is zero?
Yes, an object that was set in motion in the past by some force, but that is no longer being acted on by a net force, is moving but with zero acceleration, i.e. it is moving at constant velocity.
Why does velocity change direction zero?
The velocity, that is, the vector, is changing because it’s constantly changing direction, but the magnitude is not. So the value of the velocity won’t necessarily change just because the vector itself is changing.
What is the velocity and acceleration at the highest point?
At a projectile’s highest point, its velocity is zero. At a projectile’s highest point, its acceleration is zero.
What is acceleration at the top of trajectory?
So the acceleration of the projectile is equal to the acceleration due to gravity, 9.81 meters/second/second, from just after its thrown, through its highest point, and until just before it hits the ground.
What is the ball’s vertical velocity when it reaches the top of its trajectory?
At the peak itself, the vertical velocity is 0 m/s; the velocity vector is entirely horizontal at this point in the trajectory. These concepts are further illustrated by the diagram below for a non-horizontally launched projectile that lands at the same height as which it is launched.
Is acceleration always constant?
Note that each object has a changing velocity. Since accelerating objects are constantly changing their velocity, one can say that the distance traveled/time is not a constant value. A falling object for instance usually accelerates as it falls.
What are the directions of the velocity and acceleration of the ball when it reaches the highest point of its trajectory?
Acceleration from gravity is always constant and downward, but the direction and magnitude of velocity change. At the highest point in its trajectory, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth (see figure 1).
What happens to the velocity of a ball as it dropped off a cliff?
ground at the same time. If you drop a ball from the top of a building it gains speed as it falls. Every second, its speed increases by 10 m/s. A ball falling under the influence of gravity is an example of what we call motion with constant acceleration.
What is the velocity of the ball at the top of its path?
The direction of the ball is, at first, upwards, then it reaches the top of its path and moves in a downward direction. The speed of the ball becomes less because of the downward pull of gravity. At the top of the ball’s motion its speed is 0. At the top of the ball’s motion its acceleration is downward at 9.8 m/s.
What is the final velocity of the ball?
The ball moves up to a maximum point, then reverses and falls to the ground. The final velocity of the ball is vf = -14.7 m/s, taking down to be the negative direction. The time from when the ball leaves the child’s hand to when it hits the ground is 2.00 s.