forces - newtons law

Question 1

what is newtons first law

Answer 1

if the resulting force acting on a stationary object is 0 then the object reins stationary

Question 2

when will the velocity of an object change

Answer 2

if a resultant force is acting on the object

Question 3

what are examples of resistive forces

Answer 3

friction with the air and the road

Question 4

true or false
a resultant force can only change an objects speed

Answer 4

false
it can also change an objects direction

Question 5

what is newtons second law of motion

Answer 5

the acceleration of an object is proportional o the resultant force acting on the object and inversely proportional to the mass of the object

Question 6

if we have a greater force….?

Answer 6

we have a greater acceleration

Question 7

if the mass is larger….?

Answer 7

then the acceleration will be smaller

Question 8

how fast do cars travel on a main road in the uk

Answer 8

13 m/s

Question 9

how fast do cars travel on a motorway in the uk

Answer 9

30 m/s

Question 10

what acceleration would be required to accelerate form a main road to a motorway

Answer 10

2 m/s

Question 11

for a typical family car, what force would have to be applied

Answer 11

2000N

Question 12

objects will stay still or keep the slim motion unless a resultant force is applied
what is this called

Answer 12

inertia

Question 13

what is the inertial mass

Answer 13

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

Question 14

define inertial mass

Answer 14

the ratio of force needed to accelerate an object over the acceleration produced

Question 15

what is newtons third law

Answer 15

whenever two objects interact the forces they exert on each other are equal and opposite