newtons first law of motion and inertia

Question 1

what does newtons first law state about force acting on a stationary object?

Answer 1

if resultant force acting on a stationary object is zero, object remains stationary

Question 2

what does newtons first law state about force acting on a moving object?

Answer 2

if resultant force acting on a moving object is zero, then object will continue moving with same velocity

Question 3

what is the only way velocity of an object can change?

Answer 3

velocity of an object will only change if a resultant force is acting upon it

Question 4

what effect does a resultant force have on an object?

Answer 4

a resultant force causes an object’s speed or direction to change

Question 5

what is inertia?

Answer 5

tendency for an objects motion to remain unchanged

Question 6

what is inertial mass?

Answer 6

measure of how difficult it is to change velocity of an object

Question 7

how can we calculate inertial mass?

Answer 7

f/a = m