newtons law and forces

Question 1

what is a force and how is it measured?
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Answer 1

A force is a push or pull or twist resulting from one object’s interaction with another object. Forces only exist as a result of an interaction. they can be measured using newtons.

Question 2

A bus accelerates from 1.2 ms-1 to a speed of 15 ms-1 in 10 seconds.

The acceleration of the bus?

Formula: A = (Vf - Vi)/T

Answer 2

a=
t
(vf−vi)

a=
10
(15−1.2)
​

a=1.38ms
−2

Question 3

what is a net force and how would it be shown using a diagram?

Answer 3

The sum of the forces acting on a single object. To find the net force, add any forces acting in the same direction and subtract any forces acting in opposite directions.

Question 4

how to draw a labelled force diagram

Answer 4

point up: normal, point down: gravity, point to the left: friction, point to the right: applied. the object is in the center with arrows coming out.

Question 5

state newtons first law

Answer 5

an object will keep moving with the same speed and direction unless acted on by a net force.

Question 6

Describe what inertia is

Answer 6

Inertia is the natural tendency of an object to maintain its velocity. it is the continue of motion.

Question 7

what is newton’s second law of motion?

Answer 7

the net force of an object is equal to the objects mass multiplied by its acceleration

Question 8

State Newton’s 3rd law

Answer 8

every force has an equal and opposite reaction force.

Question 9

Solve problems for average speed, using the equation
v= t/s