Mechanics

Speed is a vector quantity because it has both magnitude and direction.

The SI unit of force is the newton (N), which is defined as the force required to accelerate a mass of one kilogram by one meter per second squared.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue moving with the same velocity, unless acted upon by an external force.

The relationship between force, mass, and acceleration is given by Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration.

Temperature is a scalar quantity because it has only magnitude and no direction.

The work done by a force is equal to the force applied multiplied by the distance through which the force is applied in the direction of the force.

The SI unit of energy is the joule (J), which is defined as the energy transferred or work done when a force of one newton is applied over a distance of one meter in the direction of the force.

A conservative force is a force that does not depend on the path taken by the object. Spring force is a conservative force because the work done by a spring force is independent of the path taken by the object.

The law of conservation of energy states that energy can be transferred from one form to another, but it cannot be created or destroyed.

Impulse is the product of force and time. According to Newton's second law of motion, impulse is equal to the change in momentum of an object.

The SI unit of angular momentum is the kilogram-meter^2/second (kg⋅m^2/s).

Torque is the product of force and the perpendicular distance from the axis of rotation. According to Newton's second law of motion for rotational motion, torque is equal to the moment of inertia of the object multiplied by its angular acceleration.

Levers, pulleys, wheels and axles, and inclined planes are all types of simple machines.

The mechanical advantage of a simple machine is the ratio of the output force to the input force.

Centripetal force is a force that acts on an object in circular motion, pulling it towards the center of the circle. Tension is an example of a centripetal force.