home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Datafile PD-CD 5
/
DATAFILE_PDCD5.iso
/
education
/
b
/
mcphysics
/
!MChoice
/
Default
/
Accelerate
next >
Wrap
Text File
|
1994-08-30
|
3KB
|
100 lines
@A ticker tape is produced where the dots are evenly spaced. This means the object was:
Moving at a constant velocity
Accelerating
Stationary
@The force that slows objects down while they travel on flat surfaces is:
Friction
Gravity
Weight
@The part of the ticker tape shown is for an object that is:
#acc1
Decelerating
Accelerating
Stationary
@A ticker tape timer produces 50 dots in 1 second. How long will it take to produce 10 dots?
0.2 seconds
5 seconds
500 seconds
@An object, deep in space, moves at a constant velocity because:
There are no forces acting
Gravity pulls it
It is weightless
@An object produces ticks on a ticker tape that get further apart. This means that it is:
Accelerating
Moving at a constant velocity
Slowing down
@An object accelerates from 30 m/s to 50 m/s in twenty seconds. What is the acceleration?
1 m/s
0.4 m/s
2.5 m/s
@The slope (or gradient) of a velocity against time graph gives the:
Acceleration
Displacement
Speed
@If the force acting on a mass is doubled then the resulting acceleration is:
Doubled
Halved
Four times as big
@If a ticker tape is made by an object which is accelerating, then the dots:
Get further apart
Remain a constant distance apart
Gradually get closer together
@Acceleration is:
the change in velocity over a period of time
always a postive number
the distance moved divided by the time it takes
@Acceleration is a vector quantity because:
it depends on the direction you are going
the size (value) of the acceleration is important
because its units are m/s
@What is meant by the term 'terminal velocity'?
An object accelerates up to a certain velocity, and then no more
An objects acceleration continues to increase at a fixed rate
The acceleration of an object falls by a constant amount
@Rain drops, falling through the air, reach a certain speed and then go no faster. This is because:
air resistance has a significant effect on them
the are small and light and so are not accelerated by gravity
they join together to form larger droplets
@Objects on the Moon fall more slowly than those on the Earth because:
The pull of gravity is less
the Moon is further away from the Earth
The Moon's atmosphere has less effect
@If a force acts on an object then it:
may move
will start to move
will come to a stop
@What is the name of the acceleration force that keeps us on the ground?
Gravity
Electrostatic
Air resistance
@When writing down values for acceleration you must state:
the size and direction
the size, and explain what object is producing the force
how big the force is
@Frictional forces are:
a negative accelerating force
forces which always make acceleration forces larger
nothing to do with accelerating forces
@Another name for a negative accelerating force is:
Friction
Gravity
Momentum