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PPT – Motion and Force Unit Review PowerPoint presentation | free to download - id: 46b4c1-N2Y5Y

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Motion and Force Unit Review

Define the following terms

Acceleration

- How quickly the velocity changes.

Balanced Force

- The net force equals zero.
- It is like having no force on the object at all

Centripetal Force

- Any force that keeps an object moving in a circle.

Distance

- The amount of space between 2 points

Force

- A push or pull on an object.
- Something that changes the motion of an object.

Friction

- A force that resists the motion between two

surfaces in contact.

Gravity

- The force that objects exert on each other

because of their masses.

Inertia

- The resistance of an object to a change in the

speed or direction of its motion.

Mass

- The amount of matter in an object.

Motion

- A change in position over time.

Net Force

- The overall force acting on an object when all of

the forces acting on it are combined.

Speed

- How fast something moves over a distance in a

defined amount of time.

Time

- An interval between 2 events.

Unbalance Force

- One force acting on an object is greater than the

other causing a change in motion of the object.

Velocity

- Speed in a specific direction.

Weight

- The force of gravity on an object.

Newtons 1st Law of Motion

- Objects at rest remain at rest.
- Objects in motion remain in motion with the same

velocity unless acted upon by an unbalanced force.

Newtons 2nd Law of Motion

- The acceleration of an object increases with

increased force and decreases with increased

mass. - The direction in which an object accelerates is

the same as the direction of the force.

Newtons 3rd Law of Motion

- Every time one object exerts a force on another

object, the second object exerts a force that is

equal in size and opposite in direction back on

the first object.

Write what measurement each letter represents and

then the formula for the following

Speed

- S D/T
- S speed
- D distance
- T time

Distance

- D ST
- D distance
- S speed
- T time

Time

- T D/S
- T time
- D distance
- S speed

Force

- F MA
- F force
- M mass
- A acceleration

Mass

- M F/A
- M mass
- F force
- A acceleration

Acceleration

- A F/M
- A acceleration
- F force
- M mass

Draw a box diagram showing direction of all

forces for the following

A Balanced Force

Fnorm

Fapp

Ffriction

Fgravity

An object slowing down

Fnorm

Ffriction

Fapp

Fgravity

A falling object

Fgravity

An object rising

Fapp

Fgravity

An object being pushed to the right

Fnorm

Ffriction

Fapp

Fgravity

An object being pushed to the left

Fnorm

Fapp

Ffriction

Fgravity

Jimmy skated 50 m in 10 s. What was his average

speed?

- Formula S D/T
- Given distance 50 m and time 10 s
- Work S 50 m / 10 s
- Answer S 5 m/s

What force should Lori apply to a 5 kg box to

give it an acceleration of 2 m/s2?

- Formula F MA
- Given Mass 5 kg and Acc. 2 m/s2
- Work F (5kg)(2 m/s2)
- Answer F 10 kg/ m/s2 or 10 N

Which graph shows a car slowing down?

- D

Which graph shows a car stopped?

- C

Which graph shows a car traveling at constant

speed?

- A

32-42 Answer questions 1-5 on page 37 and 1-6 on

page 73

- 32. A
- 33. C
- 34. B
- 35. D
- 36. B

- 37. B
- 38. D
- 39. B
- 40. C
- 41. B
- 42. B