Forces

Question 1

What force is acting on you when you are sitting on a stool?

Answer 1

Reaction Force

Question 2

What force is acting on you as you brake on a bike?

Answer 2

Friction

Question 3

What is the formula for Density?

Answer 3

Mass divided by Volume

Question 4

What is the formula for Speed?

Answer 4

Distance divided by Time

Question 5

What is the formula for Weight?

Answer 5

Mass X Gravity

Question 6

A force can be a push, pull or …

Answer 6

Twist

Question 7

What do you use to measure force?

Answer 7

A Newton Meter

Question 8

What unit do you use to measure Force?

Answer 8

Newtons

Question 9

What is air resistance also known as?

Answer 9

Drag

Question 10

What is a balanced force?

Answer 10

Forces acting on an object that are the same size but act in opposite directions

Question 11

What is Thrust?

Answer 11

A push caused by an engine

Question 12

What are the two forces acting on a stationary rubber duck, sitting on a still lake?

Answer 12

Water Resistance and Weight

Question 13

What are the two forces acting on a hot air balloon, traveling at a constant height?

Answer 13

Air Resistance and Lift

Question 14

As well as Reaction Force and Weight, what two other forces are acting on a car, driving at a constant speed along a racetrack? (NOT COUNTING FRICTION)

Answer 14

Air Resistance and Thrust

Question 15

Every 100g of mass weighs …

On earth

Answer 15

1N

Question 16

Gravity is measured in …

Answer 16

N/kg

Question 17

The earth’s gravity is…

Answer 17

9.8

Question 18

If an object has balanced forces then it is either…

Answer 18

Stationary or traveling at a constant speed

Question 19

What is Weight measured in?

Answer 19

Newtons

Question 20

What is mass measured in?

Answer 20

Kilograms

Question 21

What is friction?

Answer 21

A force caused by contact between surfaces that resists movement

Question 22

What would be the two forces acting on a magnetic pen?

Answer 22

Magnetic force and Weight

Question 23

When forces are unbalanced, an object will either…

Answer 23

Speed up or slow down

Question 24

If you were pushing a box along the ground, apart from push and weight, what would the other two forces be? (NOT COUNTING FRICTION)

Answer 24

Air resistance and Reaction Force

Question 25

What is Reaction Force?

Answer 25

The support force provided by a solid surface like a floor or tabletop

Question 26

What is Speed measured in?

Answer 26

m/s (meters per second. Also can be kilometers per hour, miles per hour, etc)

Question 27

How can you reduce friction?

Answer 27

Lubrication and Streamlining

Question 28

What is elastic extension?

Answer 28

When an object changes shape and reverts back to the original shape

Question 29

What is inelastic extension?

Answer 29

When an object changes shape and does not revert back to the original shape

Question 30

Do rubber bands obey hooke’s law?

Answer 30

No

Question 31

What is hooke’s law?

Answer 31

The extension of an elastic object is directly proportional to the force applied

Question 32

What does directly proportional mean?

Answer 32

Where a line is straight and passes through the origin

Question 33

What equation links the force applied to a spring and how far it extends?

Answer 33

F=ke

Question 34

What does “k” mean?

Answer 34

Spring constant

Question 35

What symbol does the spring constant have?

Answer 35

k

Question 36

Name 3 non contact forces

Answer 36

Magnetic, electrostatic, weight

Question 37

What is the difference between mass and weight?

Answer 37

Mass - amount of matter | Weight-amount of force acting on an object due to gravity

Question 38

What do unbalanced forces do?

Answer 38

Make an object accelerate or decelerate

Question 39

What is a force?

Answer 39

A force is a push, pull or twist acting on an object caused by interaction w/ another object

Question 40

What can forces do?

Answer 40

Forces can make things change direction, speed or shape

Question 41

What do you call a force diagram?

Answer 41

Free body diagrams

Question 42

What is a vector quantity?

Answer 42

Something that has magnitude and direction

Question 43

What type of quantity is force?

Answer 43

Vector

Question 44

What are scalar quantities?

Answer 44

Things with only magnitude but no direction

Question 45

What are some examplesr of scalar quantities?

Answer 45

Mass, speed, distance, time, temperature

Question 46

What are some examplesr of vector quantities?

Answer 46

Force, velocity, displacement, acceleration, momentum,

Question 47

What happens when two objects interact?

Answer 47

There is a force produced on both objects

Question 48

What is an interaction pair?

Answer 48

A pair of forces that are equal and opposite and act on two interacting objects

Question 49

Is mass a force?

Answer 49

NO

Question 50

Is weight a force?

Answer 50

YES

Question 51

delete this

Answer 51

---

Question 52

Name two things that are directly proportional

Answer 52

Mass+weight,extension and force applied (spring)

Question 53

Will you weigh more on the earth or the moon?

Answer 53

Earth

Question 54

1N is equivalent to how many grams?

Answer 54

1kg

Question 55

If something has a mass of 55kg, what is its weight?

Answer 55

539 (multiply by 9.8)

Question 56

What does the spring constant tell us about a spring?

Answer 56

the stiffness

Question 57

What is the unit of the spring constant?

Answer 57

N/m

Question 58

What is the formula for force applied on a spring?

Answer 58

f=ke

Question 59

Which force acts upwards on a boat sitting in water?

Answer 59

Upthrust

Question 60

what is the unit of gravitational field strength?

Answer 60

N/Kg

Question 61

Which equation links density, mass and volume?

Answer 61

density = mass / volume