The velocity has to increase in a positive direction. The increase in velocity in a positive direction is a positive acceleration.
Velocity can either increase or decrease. It can do so at either an increasing or decreasing rate (positive or negative acceleration)
When the speed (of falling) is increased, the force of gravitation will be the same, but the air resistance will increase. At some speed, the two will be in balance - there will be no more acceleration, and the object is said to have achieved terminal velocity.
It slow down, and eventually reverse direction.
the velocity of a car is be reduced when sand is loaded onto it owning to the fact that there is increase in mass of the car
Of course. Toss a stone straight up. -- From the moment it leaves your hand until the moment it hits the ground, it has constant acceleration ... the acceleration of gravity, around 10 meters per second2. The number isn't important, only the fact that the acceleration of the stone is not zero until it hits the ground. -- Velocity-wise: The stone starts out with some upward velocity, which steadily decreases until it's at the top of its arc, then the velocity becomes downward and increases until the stone hits the ground. -- At the very top of the arc, there is a point where the velocity changes from upward to downward. In order for that to happen, there must be an instant when the velocity is zero. -- But the acceleration is constant and not zero, even at that instant when the velocity is zero.
Either of these is referred to as positive acceleration: A) the object's velocity is increasing in the frame of reference B) the object is being moved in a positive direction in a coordinate plane
It accelerates in the opposite direction. Its velocity increases in the opposite direction to the direction that has been assigned positive.
Velocity can either increase or decrease. It can do so at either an increasing or decreasing rate (positive or negative acceleration)
Yes, it can happen. when the velocity is momentarily zero while an object is changing from moving in the positive direction motion to the negative direction; the object obviously will stop at one point, but will still have a constant acceleration.
The velocity in the x direction would be constant because gravity only affects the vertical components of objects. The velocity in the y direction would increase due to the constant acceleration due to gravity. The acceleration due to gravity on Earth is always -9.81 m/s^2.
it will increase.
When the speed (of falling) is increased, the force of gravitation will be the same, but the air resistance will increase. At some speed, the two will be in balance - there will be no more acceleration, and the object is said to have achieved terminal velocity.
Decreasing washers in the pan decreases mass, so acceleration should increase.
It slow down, and eventually reverse direction.
Any change in speed or direction is a change in velocity. That's an acceleration,and it directly implies the presence of force, since it can't happen without force.
the velocity of a car is be reduced when sand is loaded onto it owning to the fact that there is increase in mass of the car
Of course. Toss a stone straight up. -- From the moment it leaves your hand until the moment it hits the ground, it has constant acceleration ... the acceleration of gravity, around 10 meters per second2. The number isn't important, only the fact that the acceleration of the stone is not zero until it hits the ground. -- Velocity-wise: The stone starts out with some upward velocity, which steadily decreases until it's at the top of its arc, then the velocity becomes downward and increases until the stone hits the ground. -- At the very top of the arc, there is a point where the velocity changes from upward to downward. In order for that to happen, there must be an instant when the velocity is zero. -- But the acceleration is constant and not zero, even at that instant when the velocity is zero.