# Why does a steel ball fall with uniform velocity in a liquid although the resultant force along vertical direction is zero?

## Why does a steel ball fall with uniform velocity in a liquid although the resultant force along vertical direction is zero?

It has reached its terminal velocity and is falling at a steady speed. The resultant force is zero because the frictional force acting against it is now the same as the weight of the object.

Can an object move at a uniform velocity even if the net force acting on it is zero?

According to Newton’s First Law of motion, an object remains in the same state of motion unless a resultant force acts on it. If the resultant force on an object is zero, this means: a moving object continues to move at the same velocity (at the same speed and in the same direction)

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### When an object is dropped from a high point and falls to the ground its velocity increases?

Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls. In fact, its velocity increases by 9.8 m/s2, so by 1 second after an object starts falling, its velocity is 9.8 m/s.

When you apply a constant force to an object does the object move at a constant velocity or does its velocity increase?

Newton’s second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.

#### Why does acceleration decrease as an object falls?

Theoretically, the acceleration of gravity increases as the falling object moves closer to the center of mass of the earth. Air resistance, on the other hand, exerts and increasing force as the speed of the falling object increases, so as to make the acceleration decrease as the object falls.

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Why does acceleration decrease in free fall?

When air resistance acts, acceleration during a fall will be less than g because air resistance affects the motion of the falling objects by slowing it down. Air resistance depends on two important factors – the speed of the object and its surface area. Increasing the surface area of an object decreases its speed.

## When an object is moving at a uniform velocity does it need a force to maintain its uniform state of motion?

Originally Answered: When an object is moving at uniform velocity, does it need a force to maintain its uniform state of motion? In zero gravity it does not. The relationship between the object and the space it travels through is constant in all directions due to the uniformity of the space.

Can an object maintain uniform velocity when net?

No its is not possible for an object to maintain uniform velocity if acceleration is not zero. While it is possible when a body is present in uniform speed.

### What happens to velocity when ball is dropped?

When the ball comes back down to ground level it has exactly the same speed as when it was thrown up, but its velocity is reversed. This is an example of the law of conservation of energy.

Why does gravity cause uniform acceleration?

As gravity pulls objects toward the ground, it causes them to accelerate at a rate of 9.8 m/s 2. In the absence of air resistance, all objects fall toward the Earth with the same acceleration.

#### Why does an object move with a constant velocity when I push it or pull it across a room?

You are applying a constant force, but the constant force happens to exactly equal that from kinetic friction, hence the total force, which sets the acceleration the block experiences, is zero and it moves with constant speed, equal to that of your hand.

When an object is acted upon by a constant force it will have a uniform?

We cannot say that the body will have uniform momentum , velocity ,speed, momentum . Hence velocity , momentum and speed changes and acceleration is uniform . Hence this option is correct .