## What type of path does a moving object follow in the absence of a force?

8. **What type of path does a moving object follow in the absence of a force**? A straight line **path**.

## Is it possible for an object to move without a net force?

An **object’s** velocity (a vector) does not change if and only if the **net force** acting on the **object** is zero. In other words, if there is no **net force** on an **object**, its speed and direction of motion do not change (including if it is at rest).

## What has zero acceleration an object?

A body either at rest or moving with constant velocity **has zero acceleration**. And in the condition of mechanical equilibrium also the **acceleration zero**.

## When the net force on an object is zero its acceleration?

Newton’s First Law can be seen to be the special case in the Second Law when F, the **net force**, is **zero**. When that happens, the **acceleration** a must also be **zero**. Since **acceleration** is given by the change of velocity divided by elapsed time, the velocity doesn’t change.

## What exactly is meant by a freely falling object?

**What exactly is meant by a “freely falling**” **object**? An **object** in free fall falls under gravity alone with no friction. The acceleration of free fall is about 10 m/s2.

## Is inertia The reason for moving objects?

Yes, **inertia** keeps **objects** at rest, at rest and **objects** in motion, in motion until acted upon by an outside force.

## What will happen to an object if no force is applied?

The key point here is that **if** there is **no** net **force** acting on an **object** (**if** all the external **forces** cancel each other out) then the **object will** maintain a constant velocity. **If** that velocity is **zero**, then the **object** remains at rest. **If** an external **force is applied**, the velocity **will** change because of the **force**.

## Can a body move without force?

Yes, it is possible to have motion **without** a **force** being present. Newton’s first law states that, in fact, an object must continue to **move** at the same

## What happens when two objects collide?

Newton’s third law of motion is naturally applied to **collisions** between **two objects**. In a collision between **two objects**, both **objects** experience forces that are equal in magnitude and opposite in direction. Such forces often cause one **object** to speed up (gain momentum) and the other **object** to slow down (lose momentum).

## Can an object have zero acceleration and be at rest?

Finding the **acceleration**

Thus, even though the velocity of an **object** at **rest** must be **zero**, **acceleration can** clearly be non-**zero** for **objects** at **rest**. A particle that is thrown vertically upwards stops momentarily at the highest point of motion.

## What is the net force acting on a 1 kg ball in free fall?

The net force acting on 1-kg ball in free fall is 9.8 **N**.

## What is the net force that acts on a 1 kg freely falling object?

**What is the net force acting** on a **falling 1 kg** ball if it encounters 2N of air resistance? 2), which is equal to 10 N. Air resistance is a **force** in the opposite direction to a **falling** weight so the **net force acting** on the ball is 10 N – 2 N = 8 N.

## How do you know if net force is zero?

**If** 2 **forces** push or pull on an object in opposite directions, and the two **forces** cancel each other exactly, the **net force is zero**. **If** two **forces** act on an object in opposite directions and they don’t exactly cancel, what is left over is the **net force** (the difference in the **forces**).

## Why does force cause acceleration?

**Acceleration** and velocity

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**.

## Is 0 a constant velocity?

Car 1 – **Velocity** and acceleration graphs

**Constant velocity** means the acceleration **is zero**.