Force

Question 1

Force

Answer 1

A push or pull on an object.

Question 2

What do all forces have?

Answer 2

Magnitude and direction (vector quantities)

Question 3

What is force measured in?

Answer 3

Newtons (N)

Question 4

What is weight? How does it change?

Answer 4

Weight is vector. It changes based on gravity.

Question 5

What is mass? How does it change?

Answer 5

Mass is scalar. It does not change.

Question 6

What can natural forces do?

Answer 6

The can act between objects even if they are not touching.

Question 7

What are the types of natural forces?

Answer 7

Gravity, electromagnetic, strong nuclear, and weak nuclear

Question 8

Gravity

Answer 8

A force of attraction between objects that have mass.

Question 9

Electromagnetic force

Answer 9

A force between objects that have a charge. It governs the properties of chemical reactions.

Question 10

Strong nuclear force

Answer 10

Binds the nucleus of an atom together (overcomes the repulsion of like charges).

Question 11

Weak nuclear force

Answer 11

When a neutron decays into a proton, electron, or antineutrino.

Question 12

What is Newton’s first law?

Answer 12

Inertia

Question 13

Inertia

Answer 13

Objects at rest tend to stay at rest and objects in motion tend to stay in motion unless acted upon by an external force.

Question 14

Greater mass=…

Answer 14

Greater inertia

Question 15

What is Newton’s second law?

Answer 15

Acceleration (f=ma)

Question 16

Law of acceleration

Answer 16

When a net force acts on an object, the object accelerates in the direction of the force.

Question 17

What is the acceleration proportional to?

Answer 17

Directly - force

Inversely - mass

Question 18

What is Newton’s third law?

Answer 18

For every action there is an equal and opposite reaction.

Question 19

What happens whenever an object exerts a force on a second object?

Answer 19

The sec on object exerts a force that is equal in magnitude and opposite in direction.

Question 20

If the force is applied at an angle, how do you find the actual applied force?

Answer 20

Make a right triangle and use SOH CAH TOA to find the x component.

Question 21

How do you fine the acceleration of the train?

Answer 21

1) F net/m total

Question 22

How do you find the tension of the train?

Answer 22

F net=mass of whatever the string is holding x a

T=F net-Fa

Question 23

Friction

Answer 23

Force that opposes the motion when one surface slides across another.

Question 24

What does friction have to do with acceleration?

Answer 24

The applied force needs to be greater than the force of friction in order for an object to accelerate.

Question 25

What happens if Fa=Ff?

Answer 25

The object is stopped or moving at a constant velocity.

Question 26

What ere the types of friction?

Answer 26

Static, sliding, rolling, air, and viscous (water)

Question 27

Static friction (Fs)

Answer 27

The force that prevents a stationary object from moving.

Question 28

Starting friction

Answer 28

The maximum static friction.

Question 29

Kinetic friction

Answer 29

The force that acts against an object’s motion in the opposite direction.

Question 30

Normal force

Answer 30

A perpendicular force applied by the surface on an object.

Question 31

What focus are positive? Negative?

Answer 31

+ up and right (forwards)

- down ada left (backwards)

Question 32

What is FN equal to?

Answer 32

Fg

Question 33

What is Fa equal to?

Answer 33

Fs

Question 34

Coefficient of friction

Answer 34

Ff divided by FN

Question 35

What is the symbol for coefficient of friction?

Answer 35

Mew ( μ )