Physical Science Chapter 10 Study Guide

Question 1

A push or pull

Answer 1

Force

Question 2

How do you describe a force in a way that is similar to describing velocity and Acceleration

Answer 2

A force is described by its strength and direction

Question 3

SI unit for all forces

Answer 3

Newton

Question 4

The combo of all forces acting on an object

Answer 4

Net force

Question 5

When 2 forces are in the same direction what do u do?

Answer 5

Add them together

Question 6

When 2 forces are in different directions what do u do?

Answer 6

U subtract to find the net force

Goes direction that is bigger in problem

Question 7

What are forces that r equal but in opposite directions?

Answer 7

Subtract them to get 0N net force. No arrow

Question 8

Forces acting on an object resulting in a net force and cause a change in the objects motion

Answer 8

Unbalanced forces

Question 9

Equal forces acting on an object in opposite directions do not change the objects motion

Answer 9

Balanced forces

Question 10

What two factors determine the strength of a friction force.

Answer 10

How hard the surfaces push together

The types of surfaces involved

Question 11

Friction opposes motion. Give an example

Answer 11

Treads on a car tire:start moving:start moving

Tennis shoes have treads=help u walk better

Question 12

Occurs when one solid surface slide over another

Answer 12

Slidling friction

Question 13

Acts on objects that are not moving. In the opposite direction of the intended motion

Answer 13

Static friction

Question 14

Occurs when one object rolls over a surface. Easier to overcome than sliding friction

Answer 14

Rolling friction

Question 15

Occurs when a solid object moves through fluid. Easier to I overcome than sliding friction. Fluid used include oil water or air

Answer 15

Fluid friction

Question 16

A force that pulls objects toward each other

Answer 16

Gravity

Question 17

The force if gravity acts between all objects in the universe

Answer 17

Law of universal gravitation

Question 18

What r the two factors that affect gravity

Answer 18

More mass=more gravity

Distance=as distance between two objects, gravity decreases

Question 19

Amount of matter in an object

Answer 19

Mass

Question 20

Gravity in relation to mass

Answer 20

More massive objects exert more gravity

Question 21

Difference between mass and weight

Answer 21

Mass-(amount of matter) doesn’t vary with the strength of gravity
Weight-a measure of the amount of gravity acting on an object

Question 22

How does the astronauts weight and mass on earth compare to mass and weight on the moon

Answer 22

Mass stays the same in both places. since gravity is different weight is different

Question 23

The motion of a falling object when the only force acting on it is gravity

Answer 23

Freefall

Question 24

What causes an object in freefall to accelerate

Answer 24

The force of gravity is an unbalanced force which uses an object accelerate

Question 25

Near the surface of earth the acceleration due to gravity is. This means that for every second an object is falling it's velocity increases by 9.8 m/s

Answer 25

9.8 m/s

Question 26

The fluid friction of Upward force of air on the downward motion of an object

Answer 26

Air resistance

Question 27

When the force of air resistance upward equals the weight of the falling object (gravity force) the object stops doesn't accelerate, falls at constant speed

Answer 27

Terminal velocity

Question 28

The motion of an object when thrown horizontally on earth

Answer 28

Projectile motion

Question 29

What is the shape of projectile motion

Answer 29

A curved path because a resistance and gravity are both acting simultaneously

Question 30

Claims that an object at rest will stay at rest and an object exerts a force on another object then the second object exerts a force of equal strength in the opposite direction on the first object

Answer 30

Newton's first law

Question 31

Tendency of an object to resist any change in its motion | Also called newtons 1st law

Answer 31

Inertia

Question 32

How is mass related to inertia

Answer 32

The greater the mass the greater its inertia

Question 33

Acceleration: depends upon and objects mass and the net force acting on the object

Answer 33

Newtons 2nd law

Question 34

Acceleration is measured in

Answer 34

M/s2

Question 35

Mass is measured in

Answer 35

Kg

Question 36

Forces math formula is

Answer 36

Mass x acceleration

Question 37

Force is measured in

Answer 37

Newtons

Question 38

If one object exerts a force on another then the second object exerts a force of equal strength in the opposite direction on the first object for every action there is an equal but opposite reaction force

Answer 38

Newtons third law

Question 39

How can action reaction forces not cancel each other out

Answer 39

When the forces act on different objects

Question 40

How can momentum be determined

Answer 40

The momentum of a moving object can be determined by multiplying the objects mass and velocity

Question 41

What is the correct unit for momentum

Answer 41

Kg x m/s

Question 42

The rule of fact in the absence of outside forces the total momentum of object that interact does not change A common outside force is friction

Answer 42

Law of conservation of momentum

Question 43

How does a rocket lift off the ground

Answer 43

Gasses the rocket expels with a downward action force. The action force causes the rocket to lift upward with an equal reaction force. As long as this upper pushing force called thrust is greater than downward pull of gravity there is a net force in upward direction. As a result the rocket accelerates upward into space

Question 44

What is the satellite

Answer 44

Any object that orbit another object in space

Question 45

If force that causes an object to move in a circular path

Answer 45

Centripetal force

Question 46

What is the centripetal force of the satellite

Answer 46

The gravitational force pulls satellites towards the center of Earth

Question 47

Describe the path of a projectile motion

Answer 47

Curved path | The object moves forward while gravity pulls it downward