Exam With Questions And Correct Answers
Speed= - answer-distance/time
The two factors that determine velocity include - answer-Speed direction/ distance time
Acceleration = - answer-2 velocity- 1 velocity /time
What do we do with two velocities when they are in the same direction? - answer-+
What do we do with two velocities when they are in opposite directions - answer--
-Total distance/total time. - answer-average speed
-Speed at any one given moment. - answer-instantaneous speed
-The rate at which velocity changes (a change in speed or direction over time). - answer-acceleration
-The place or object that you compare another object to in order to determine if it is in motion. -
answer-reference point
-The technical term for deceleration. - answer-Negative acceleration
What is the speed of a ball rolling 3m in 2s? - answer-1.5 m/s
A truck driver traveled across the country in 11.3 hours. He traveled a distance of 804 km. What was his
average speed? - answer-71.1
How much distance to go 54 m/s for 80 s? - answer-4320 m
What was the acceleration of a car that went from 60 m/s to 72 m/s in 4 s? - answer-3 m/s 2
Mrs. Mousadis was riding her skateboard. She was trucking along at about 5 m/s when all of a sudden
she hit some bad pavement and 1.5 seconds later she found herself going only 2 m/s. Calculate her
acceleration. - answer--2 m/s 2
What is the acceleration of a toy car going from 4.5 m/s to 2.4 m/s in 3 s? - answer--0.7 m/s 2
Find the average speed of a car if it first traveled 32 km in 0.5 hr, then 128 km in 2.1 hr, and finally 303
km in 5 hrs. - answer-60.9 k/h
When would a car travel at a constant velocity by also be accelerating? - answer-Turn
What is the SI unit for mass? - answer-kilogram (kg)
What is the unit for force? - answer-N (newtons)
, What is the unit for speed? - answer-m/s (meters per second)
What is the unit for acceleration? - answer-m/s^2 (metres per second squared)
What is the unit for velocity? - answer-m/s (meters per second)
What is the unit for weight? - answer-N (newtons)
Newton's 1st Law of Motion - answer-An object at rest remains at rest, and an object in motion remains
in motion at constant speed and in a straight line unless acted on by an unbalanced force.
Newton's 2nd Law of Motion: - answer-Force = mass x acceleration
Newton's 3rd Law of Motion: - answer-For every action there is an equal and opposite reaction
If mass increases, inertia.... - answer-increases
If mass increases, weight... - answer-increases
If net force increases, acceleration - answer-increases
Given the same amount of force; if mass increases, acceleration - answer-Decreases
If velocity increases, momentum - answer-increases
If friction increases, rate of motion - answer-decreases
What is the acceleration if you forced a 50 kg box with 82 N? - answer-1.64 m/s 2
What is the mass of a box if it accelerated 5 m/s? from a force of 12 N? - answer-2.4 kg
-the force that accelerates objects towards Earth. - answer-gravity
-the kind of friction that exists between oil and a door hinge. - answer-Fluid friction
-the force that one surface exerts on another when rubbing - answer-Friction
-the kind of friction that slows a falling object. - answer-air resistance/fluid friction
-exists when the only force acting on an object is gravity - answer-free fall
-the kind of friction when sandpaper rubs against wood - answer-sliding friction
-kind of friction that results when a wheel turns on a surface - answer-rolling friction
-measure of the force of gravity on an object. - answer-weight
-falling objects reach this when forces of gravity and air resistance are balanced. - answer-terminal
velocity