Newton's Laws of Motion

Question 1

what does inertia mean

Answer 1

the tendency of an object to remain in a steady state (at rest or uniform motion)

Question 2

how is force acting on an object related to its momentum

Answer 2

force acting on an object=rate of change of momentum

Question 3

what is the law of conservation of momentum

Answer 3

in a closed system, the total momentum before an event is equal to the total momentum after it

Question 4

3 factors affecting braking distance

Answer 4

-speed
-road conditions
-condition of tyres/breaks

Question 5

what is stopping, thinking and braking distance

Answer 5

stopping=name given to distance vehicle travels after driver spotted a hazard
thinking=distanced travelled during driver’s reaction time
braking=distance travelled after brakes are applied

stopping distance=thinking+braking

Question 6

what does Newton’s 3rd law say

Answer 6

when 2 objects interact they exert equal and opposite forces on each other

Question 7

what is the inertial mass of an object

Answer 7

how difficult it is to change it’s velocity

Question 8

according to newton’s 2nd law, what is the acceleration of an object inversely proportional to

Answer 8

mass

Question 9

according to newton’s 2nd law, what is the acceleration of an object proportion to

Answer 9

the force acting on it

Question 10

what forces are balanced when an object travels at a steady speed

Answer 10

resistive forces=driving forces

Question 11

what does Newton’s 1st law say

Answer 11

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