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# science

### Unit 1

which of the following are two factors that determine speed? distance and time
when the net forces equal to 0 N, they are which of the following? Balanced
which pf the following always causes change in speed, direction, or both? unbalanced forces
what is a force that opposes motion between two surfaces that are in contact? friction
which are the two factors that determine the amount of friction? the force an the roughness of the surface
which of these is an example of kinetic friction a box sliding on a floor
which of these is an example of static frication a worker pushing a non-moving box
in which of the following activities frication helpful car tired moving forard
in which of the following is frication harmful car engine parts wearing out
what is the net force on an object when you combine a force of 10 N north with a force of 5 N south? 5 N north
dividing the distance traveled b the total time is how to calculate average speed
the difference between speed and velocity is that velocity has direction, while speed does not
when a mover puts furniture in wheels, which type of friction is the mover using to make the job easier? rolling kinetic friction
A hiker's velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that the hiker has a negative acceleration? the speed decreased
In which of the following is a skater NOT accelerating? going strait in a constant speed
An unbalanced force can cause an object's motion to change by? changing direction or speed, start or stopping motion
What would you call a building if you compared it with a moving student? a referance piont
What is the SI unit for speed? m/s
What is a way to reduce friction? wax skies before skiing down a slope
which of the following is an example of balanced force? a porch swing hanging from the porch roof
Created by: 577254742485106