Motions and forces sp2

Question 1

what is a vector quantity

Answer 1

has direction as well as magnitude
eg. velocity or forces

Question 2

what is a scalar quantity

Answer 2

has only magnitude no direction
eg.speed

Question 3

what is newton’s first law

Answer 3

According to Newton’s first law of motion, an object remains in the same state of motion unless a resultant force acts on it
if the resultant force on an object is zero this means a stationary object stays stationary and a a moving object continues to move at the same velocity

Question 4

what is newtons second law

Answer 4

Newton’s second law of motion can be described by this equation:
resultant force = mass × acceleration or f=ma
In other words, the acceleration of an object increases if the resultant force on it increases, and decreases if the mass of the object increases.

Question 5

what is the definition of momentum

Answer 5

momentum is the tendency of an object to keep moving or of how hard it is to stop moving. momentum depends on a vector quantity (velocity) and is a vector itself

Question 6

what is a reaction time

Answer 6

the time between a person detecting a stimulus and their response