Force is the mass of an object, multiplied by its acceleration. The unit of force is . This is called a Newton, with the symbol N. Force has a magnitude and a direction.

force = mass x acceleration

F = ma

F = force

m = mass

a = acceleration

Common symbols:

F→, F

SI unit:

Newton

In SI base units:

kg·m/s^{2}

Other units:

dyne, poundal, pound-force, kip, kilo pond

Derivations from other quantities:

F = m a

Dimension:

LMT^{-2}

What are the Effects of Force?

In physics, motion is defined as the change in position with respect to time. In simpler words, motion refers to the movement of a body. Typically, motion can either be described as:

Change in speed

Change in direction

The Force has different effects and here are some of them.

Force can make a body that is at rest to move.

It can stop a moving body or slow it down.

It can accelerate the speed of a moving body.

It can also change the direction of a moving body along with its shape and size.

Force Formula Questions:

1) A 0.15 kg coconut falls out of its tree. The acceleration due to gravity is 9.80 m/s^{2}, down. What is the force acting on the coconut due to gravity?

Answer: The force can be found using the equation:

F = ma

F = (0.15 kg)(9.80 m/s^{2})

F = 1.47

F = 1.47 N

The force due to gravity acting on the coconut is 1.47 N, down.

2) A man pushes a 50.0 kg block of ice across a frozen pond. He applies a force of 25.0 N, pushing the block away from him. What is the acceleration of the block?

Answer: To find the acceleration, rearrange the equation:

The block is accelerating 0.50 m/s^{2}, directed away from the man.