Vocabulary
The process of changing position
Motion
Name one unit of measurement for speed
m/s, mph, km/hr, ft/min, etc. (any combination of distance unit / time unit)
Name one unit of measurement for acceleration
most common: m/s2
(will take any combination of distance / unit of time squared)
What is the unit of force?
Newton (N)
True or False: a body at rest can have motion without any external forces
FALSE
Define velocity
the speed AND direction of a moving object
What is the equation to calculate speed?
Speed = Distance / Time
Name one motion change involved in acceleration
increased speed, decreased speed, change in direction
This type of force requires the object to be touched by the exerting object
Contact force
What is Newton's Third Law of Motion?
For every action, there is an equal and opposite reaction
The gravitational force exerted on an object
Weight
What is the equation for distance?
Distance = Speed x Time
Which of the following examples do not involve acceleration?
a. Jupiter orbiting the sun
b. A skateboard rolling on a straight path
c. An apple falling from a tree
d. The SHIM van slamming on the brakes
b. A skateboard rolling on a straight path
Which surface will create more friction for a rolling soccer ball - grass outside or the floor of the gym?
Grass
Which of Newton's Laws of Motion can be used to describe the following phenomenon: a book laying on a table does not move
TWO ANSWERS:
First Law --> an object at rest stays at rest
or
Third Law --> the weight of the book acts in equal and opposite force to the table holding the book up
Define friction
a contact force that resists the sliding motion of two surfaces that are touching
It takes Miss Lexie 20 seconds to get to the gym when walking a speed of 0.75 m/s. How far is the gym from the homework help room?
Distance = Speed x Time
Distance = 0.75 m/s x 20 s = 15 meters
When does acceleration occur on the following motion graph? (link to graph: https://docs.google.com/document/d/1DUDwCO_S3GGfMTHYcSykgf6hFBN5OzdXdlXnbAR5Gb8/edit?usp=sharing)
Between 3 and 5 seconds
Name one example of fluid friction
water resistance, air resistance, etc.
What equation is associated with Newton's Second Law of Motion?
Force = Mass x Acceleration (F = ma)
or
Acceleration = Force / Mass (a = F / m)
The tendency of an object to resist a change in its motion
Inertia
It takes Miss Susie 30 minutes to drive 15 miles to pick up a student. How fast is she driving in miles per hour?
30 minutes = 0.5 hours
Speed = 15 miles / 0.5 hours = 30 mph
Draw a motion graph that depicts an object in the following way:
1. The object travels 5 meters at a constant velocity for 4 seconds
2. The object takes 3 seconds to slow down, travelling 2 meters in the process
2. The object comes to a complete stop and does not move for 3 seconds
*link to answer: https://docs.google.com/document/d/1_XulUz5HxevG5pPK98BfzqWGFgdGO-F59H4dARuwD3M/edit?usp=sharing*
No X-axis = -50 pts
No Y-axis = -50 pts
What is the constant force exerted on all objects on Earth?
Gravity
Miss Lexie was late for work and didnt have time to do this last question so free points for every team
:)