Thermal
Bimetallic strips can be found in
and

Explanation:

The bimetallic strips are used to control the temperature  of appliances . As the temperature increases beyond normal or the temperature decreases beyond normal . Due to this strip the , appliance is disconnected . Which keeps the appliance safe from damage .

It is used in water Geysers and electric iron or Refrigerators  

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.