Table of Contents
Can a body have 0 velocity and still be accelerating?
Yes, an object can have zero velocity and still be accelerating simultaneously. Then the object will start to move in the backward direction.
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.
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.
Which of the following has zero velocity?
The state of motion of an object is defined by its velocity the speed with a direction. Thus, inertia could be redefined as follows: Inertia: tendency of an object to resist changes in its velocity. An object at rest has zero velocity and (in the absence of an unbalanced force) will remain with a zero velocity.
Is it possible for a body to be accelerated?
Yes, it is possible for a body to accelerate, without changing the speed. Bodies in circular motion are continuously accelerating. Even if they don’t change their speed, their velocity is constantly changing due to continuous change in direction of motion.
Can a body have constant speed and still have uniform acceleration?
Can A Body Have A Constant Speed And Still Have A Varying Velocity? Yes if the body is travelling with uniform speed in a circular track its speed remains the same but the velocity is non-uniform as the direction of the body is changing every time.
Can a body have a uniform speed but still have acceleration?
(i) A body can have acceleration even when it has uniform speed. A body in uniform circular motion has uniform speed but at every point its direction of velocity changes, so its motion is accelerated. (ii) Yes, a body can have acceleration even when its velocity is zero.
Can a body move on a curved path without having acceleration?
No, a body cannot move on a curved path without acceleration because while moving on a curved path, the velocity of the body changes with time.
Is there acceleration at constant velocity?
An object with a constant acceleration should not be confused with an object with a constant velocity. If an object is changing its velocity -whether by a constant amount or a varying amount then it is an accelerating object. And an object with a constant velocity is not accelerating.
Under what circumstances if any can an object move in circular path without being accelerated?
Circular motion requires a net inward or “centripetal” force. Without a net centripetal force, an object cannot travel in circular motion. In fact, if the forces are balanced, then an object in motion continues in motion in a straight line at constant speed.
Which force is required for circular motion?
To summarize, an object in uniform circular motion experiences an inward net force. This inward force is sometimes referred to as a centripetal force, where centripetal describes its direction.
Which force is required to maintain a body in uniform circular motion?
What keeps the object moving in circular path?
A centripetal force is a net force that acts on an object to keep it moving along a circular path. Newton’s 1ˢᵗ law tells us that an object will continue moving along a straight path unless acted on by an external force. The external force here is the centripetal force.
What are 3 examples of centripetal force?
Examples of centripetal force
- Driving around a circular path.
- Banked turn of an aircraft.
- Children’s swing.
- Merry-go-round or carousel.
- Revolution of planets around the Sun.
- Washing machine dryer.
- Liquid mirror telescope.
- Loops in a roller coaster.
Can speed be zero circular motion?
According to Newton’s first law, a body in motion will remain in motion with constant velocity if the net force acting on it is zero. Constant velocity means that both the speed and direction do not change….Force and Circular Motion.
|Radius (m)||Velocity (m/s)||Force (N)|
How can an object accelerate towards the center without getting closer to the center?
If an object is in uniform circular motion, then it is accelerating towards the center of the circle; yet the object never gets any closer to the center of the circle. It maintains a circular path at a constant radius from the circle’s center.
What is constant speed?
An object is travelling at a steady or constant speed when its instantaneous speed has the same value throughout its journey. For example, if a car is travelling at a constant speed the reading on the car’s speedometer does not change.
Why is centripetal acceleration always towards the center?
There is an acceleration and that’s its equation. This means that whatever direction the position vector points, the acceleration vector points the opposite way. Since the position vector always points out and away from the center of rotation, the acceleration vector always points in and towards the center.
What is the difference between positive and negative acceleration?
Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity.
What is an example of a negative acceleration?
Because the velocity/speed of this object is decreasing over time, this means there is a negative acceleration. A jet airliner starts at rest and moves down the runway in a straight line. After accelerating for 20 seconds, it reaches a speed of 80 meters per second.
What does it mean if an object has a positive velocity but a negative acceleration?
An object which moves in the positive direction has a positive velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a negative acceleration).
Can a car have negative velocity and positive acceleration?
Yes, the velocity of an object can be negative when its acceleration is positive and vice versa. An example of such a situation is when an object is launched vertically upwards and moves freely under the action of gravity.
Is acceleration positive or negative when jumping?
Experiment M-1 The Physics of Jumping Ver 1.4 The acceleration is negative while the velocity is increasing, then the velocity is decreasing (to the same direction) so the acceleration is positive.
What is the difference between an object with constant acceleration and an object with constant velocity?
When an object’s velocity and acceleration point in the same direction, your speed increases. If its velocity and acceleration point in different directions, your speed decreases, or decelerates. Constant acceleration indicates that an object’s acceleration rate was constant in its motion.
What happens if velocity is constant?
Motion with Constant Velocity: When an object is moving with constant velocity, it does not change direction nor speed and therefore is represented as a straight line when graphed as distance over time. You can also obtain an object’s velocity if you know its trace over time.