Does the acceleration of the ball decreases when it is rising?
It’s acceleration is also zero. The direction of a ball’s motion is changing as it rises into the air when thrown. The speed of the ball decreases because gravity pulls it towards the ground and makes the distance it can cover in one second decrease. On the way up, the ball is accelerating downward at 9.8 m/s^2.
Why is the acceleration positive even though the cart is slowing down?
When the fan is pointed in the direction of the shove, the force is positive and the cart slows down. The acceleration is positive because the negative velocity decreases. when the velocity is momentarily zero while the cart is changing from moving in the negative direction to the positive direction.
Can acceleration be constant when speed is not zero?
An object’s acceleration is the rate its velocity (speed and direction) changes. Therefore, an object can accelerate even if its speed is constant – if its direction changes. If an object’s velocity is constant, however, its acceleration will be zero. Since it travels in a straight line, its direction does not change.
What is the acceleration of a body zero?
According to newton’s first law of motion, the acceleration of the body could be zero if there is no force acting on it. Acceleration in an object could be zero even when several forces acting on it. This happens when all the forces cancel out each other i.e the net force acting on the object is zero.
Can an object’s acceleration be in the opposite direction to its motion?
Keep in mind that although acceleration is in the direction of the change in velocity, it is not always in the direction of motion. When an object slows down, its acceleration is opposite to the direction of its motion.
Is it possible to move with negative acceleration and speed up?
An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down. Subtracting from the value of the velocity could increase the speed of an object if the velocity was already negative to begin with since it would cause the magnitude to increase.
Does a fast moving object always have higher acceleration than a slower object?
Satellites move at very fast speed around earth but not necessary that their acceleration is large. However a racing car acceleration initially has a very high acceleration but its speed very less as compared to that of satellite.
What does it mean if you have a negative velocity?
To distinguish between two directions in velocity, you can have a positive and a negative vector: vectors that point in the opposite direction. Therefore, a negative velocity means that the direction of that velocity is opposite to the other velocity (with the positive value).
What is called positive acceleration?
A positive acceleration means an increase in velocity with time. negative acceleration means the speed reduces with time. its a retardation. If the speed is increasing, the car has positive acceleration. When the car slows down, the speed decreases.
What is the simplest type of motion?
The simplest form of motion is the motion in a straight line. The distance and displacement are the quantities used to determine the final position of the object with respect to the initial position.
What is positive acceleration example?
Positive acceleration= A bus or car moving with increasing speed has positive acceleration. We can say that it is accelerating with the direction of travel. Negative acceleration=In the above example, if we apply the break, the speed of the car decreases. Then it has negative acceleration.