Forces

Question 1

what’s motion

Answer 1

Motion is a change in position over time

Question 2

speed formulae

Answer 2

distance/time

Question 3

velocity formula

Answer 3

Displacement/Time

Question 4

How to calculate net force with unbalanced force

Answer 4

unbalanced forces that act in opposite directions need to be subtracted to get the net force.

Question 5

How to calculate net force with balanced force

Answer 5

The net force of unbalanced forces acting in the same direction is simply the sum of the forces

Question 6

Avg speed formula

Answer 6

TOTAL distance/TOTAL time

Question 7

when the velocity changes its either a change in # or ?

Answer 7

Direction or speed

Question 8

acceleration formula

Answer 8

Change in velocity/time (m/s2)

Question 9

What is force

Answer 9

A push or pull that makes something move

Question 10

force formula

Answer 10

Mass x acceleration

Question 11

If a bee is flying in a circle at constant speed, is the bee accelerating? Justify your answer

Answer 11

Yes, when direction is changed velocity changes and when when velocity changes it accelerates

Question 12

What is the 1st law of motion/inertia ?

Answer 12

An object in motion will remain in motion unless a force acts upon it

Question 13

What is inertia?

Answer 13

Matter’s resistance to change in motion

Question 14

“Objects with more mass has more inertia”
Justify this statement

Answer 14

If two balls of different sizes has the same velocity is easier to stop the small than the big ball because of inertia

Question 15

What is momentum

Answer 15

measure of how difficult it is to change the inertia of an object

Question 16

Momentum formula

Answer 16

mass x velocity

Question 17

what is the 2nd law of motion

Answer 17

The acceleration of an object is equal to the net force/mass of an object

Question 18

More ____ an object has ,the more force you need to accelerate it

Answer 18

MASS

Question 19

more force applied to an object the _______ it will accelerate

Answer 19

FASTER

Question 20

_____ mass will accelerate more

MORE/LESS

Answer 20

LESS

Question 21

More mass will accelerate ____

MORE/LESS

Answer 21

LESS

Question 22

When the Net force (NF) is the ______ direction as the velocity the object, it speeds up

SAME/OPPOSITE

Answer 22

SAME direction

Question 23

When the NF is in the __________ direction as the velocity ,the object slows down

SAME/OPPOSITE

Answer 23

OPPOSITE direction

Question 24

2 types of forces

Answer 24

BALANCED and UNBALANCED force

Question 25

Give example for unbalanced force

Answer 25

If you’re riding your bike ,and the wind is blowing in the same direction as you r cycling you will speed up and its an unbalanced force

Question 26

Give example for balanced force

Answer 26

If you’re riding your bike ,and the wind is blowing in the opposite direction as you r cycling you will slow up and its a balanced force

Question 27

What is the 3rd law of motion

Answer 27

For ever action there is a equal but opposite reaction

Question 28

When you strike the ground with your feet, you exert force on earth and earth exerts equal but opposite force on you propelling you forwards. Why doesn’t the Earth move

Answer 28

As the earth is so much more massive than us the same force that causes us to accelerate doesn’t affect the earth(but its there)