forces

Question 1

e.g of scalar quantities.

Answer 1

Mass
Temperature
Speed
Energy
Distance
TIme

Question 2

what does magnitude mean?

Answer 2

magnitude means size

Question 3

Scalar quantities do not have a what?

Answer 3

Scalar quantities do not have a direction

Question 3

e.g of vector quantities

Answer 3

displacement
weight
force
velocity
acceleration
momentum

Question 4

vector quantities have both magnitude and direction

Answer 4

true

Question 5

what can we represent vectors as?

Answer 5

we can represent vectors using arrows

Question 6

What is force?

Answer 6

A force is just a push or a pull that acts on an object due to an interaction with another object

Question 7

what’s force measured in?

Answer 7

Force is measured in newtons(N)

Question 8

What can force do?

Answer 8

Force can change an object’s speed, direction, or shape.

Question 9

types of forces

Answer 9

Gravity
Friction
Air Resistance
Tension
Magnetic
Upthrust
Electrostatic

Question 10

what happens if forces are unbalanced

Answer 10

Object accelerates, decelerates, or changes direction.

Question 11

3 Newton’s Laws of Motion

Answer 11

1st Law (Inertia)
2nd Law (F = ma)
3rd Law (Action & Reaction)

Question 11

what happens in 1st Law (Inertia)

Answer 11

Objects that stay still or keep moving unless a force acts on them.
e.g A car keeps moving unless friction or brakes stop it.

Question 12

what happens in 2nd Law (F = ma)

Answer 12

Force = Mass × Acceleration
F=m×a

More force = more acceleration (F = ma).

If force increases, acceleration increases.

Question 13

3rd Law (Action & Reaction)

Answer 13

Every action has an equal and opposite reaction (e.g., pushing on a wall, it pushes back)

example: When you push on a wall, it pushes back with equal force.

Question 14

what acceleration

Answer 14

The rate at which velocity changes.

Question 15

Mass (kg)

Answer 15

The amount of matter in an object.

Question 16

what’s Weight (N)

Answer 16

Weight (N) is Force due to gravity.

Question 17

what happens if If forces are balanced

Answer 17

If forces are balanced → No change in motion.

Question 18

formula for wight

Answer 18

W=m×g

e.g Example 1: A 5 kg object.

Question 19

What’s g = Gravitational field strength

Answer 19

On Earth=10N/kg (approximately).

Question 20

How to calculate speed?

Answer 20

Speed = Distance ÷ Time

v= d÷t

​

Question 21

how to calculate acceleration?

Answer 21

Acceleration = Change in velocity ÷ Time

a= t÷Δv

​

Question 22

what happens if an object falls freely?

Answer 22

It accelerates at at 10 m/s² due to gravity.

Question 23

How do u calculate stopping distance?

Answer 23

Stopping Distance = Thinking Distance + Braking Distance

Question 24

equation for force

Answer 24

F= m×a force = mass× acceleration

Question 25

Equation to find acceleration

Answer 25

acceleration= force ÷ mass a = f÷ m

Question 26

eaquation to find mass

Answer 26

m= f÷a

Question 27

forces can make objects what?

Answer 27

Forces can make things: ✅ Move ✅ Stop ✅ Change direction ✅ Change shape

Question 28

difference between vecotor and scalar

Answer 28

Scalars have only magnitude (size). They do NOT have direction. Speed (e.g., 30 mph) Mass (e.g., 70 kg) Vectors have both magnitude AND direction. Example Velocity (e.g., 30 mph north)

Question 29

What does Gravity do?

Answer 29

Gravity – Pulls things down (e.g., keeps us on Earth).

Question 30

What does Friction do?

Answer 30

Friction – Slows things down (e.g., rubbing hands together).

Question 33

how can a vector quantity be drawn and what does it show?

Answer 33

Arrows present magnitude (size) and direction

Question 34

What does the size of the arrow show?

Answer 34

The size of the arrow shows the size of the force

Question 35

What does the direction show?

Answer 35

The direction of the arrow shows the

Question 36

what's a resultant force?

Answer 36

The overall force acting on an object, after all the forces are added together.

Question 37

what piece of equipment can be used to measure an objects weight?

Answer 37

a calibrated spring balance or newtons metre

Question 38

balance point

Answer 38

The centre of mass is the point where the weight of the object is evenly spread. It’s where you could balance the object perfectly.

Question 39

whats's the unit used for gravitational field strenght?

Answer 39

N/kg

Question 40

what's the unit used for weight

Answer 40

The newtons N

Question 41

What quantities does the weight depend on?

Answer 41

Weight = Mass ×Gravitational Field Strength (W = mg) the objects mass and gravitational field strenght at the given position in the field

Question 42

what is weight?

Answer 42

the force that acts on an object due to gravity and the object's mass

Question 43

e.g of scalar quantities

Answer 43

temperature time distance speed energy

Question 44

e.g of vector quantities

Answer 44

velocity displacement force acceleration weight

Question 45

is force a scalar or vector quantity

Answer 45

force is vector quantity because it has both size and magnitude

Question 46

give e.g of non contact forces

Answer 46

gravitational forces electrostatic forces magnetic forces

Question 47

e.g of contact forces

Answer 47

friction air resistance tension

Question 48

what are 2 categories forces can be split into?

Answer 48

Contact and non contact forces