Describe the different forces upon a falling object with reference to Newton's first law.
A falling object will reach terminal velocity when the force draging it down (ie its weight due to gravity) is equal to the air resistance opposing the motion upwards. When the two forces are equal the object will experience a constant velocity downwards and thus no acceleration. This is in accordance with Newton's second law that states that an object will remain in its current state of motion unless acted upon by another force.
AL
Related Physics GCSE answers
All answers ▸What is refraction?
State one advantage and one disadvantage of using a CT scanner, compared with ultrasound scanning, for forming images of the inside of the human body. (2 Marks)
I never know where to start where I get a calculation question given many values, what should I do? (e.g: finding how much energy is needed for all the ice in a glass of water to melt after the ice is dropped into warm water)
Kinetic theory describes the movement of particles in three states of matter. If a cube of ice is put in a tin with a tight fitting lid and continuously heated, why does the lid explode off?