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WorksheetsG6 Forces End of unit quiz
Total questions: 30
Worksheet time: 51mins
A force acting on an object does no work if
a machine is used to move the object.
the force is not in the direction of the object’s motion.
the force is greater than the force of friction.
the object accelerates.
What is the speed of a bobsled whose distance time graph indicates that it traveled 100 m in 25 seconds?
4m/s
0.25m/s
250m/s
100m/s
The force that one surface exerts on another when the two rub against each other is called
gravity
inertia
friction
acceleration
Which of the following would become difficult if there was no frictional force
moving a heavy box from one place to another.
playing billiards
the movement of a door.
walking on a wet marble floor
What is transferred by a force moving an object through a distance?
motion
energy
force
mass
Speed is the ratio of the distance an object moves to____
the displacement of the object.
the motion of the object.
the amount of time needed to travel the distance.
the direction the object moves.
When a pair of balanced forces acts on an object, the net force that results is:
greater in size than one of the forces.
equal to zero.
equal in size to one of the forces.
greater in size than both forces combined
Which of the following materials will sink in water? (The density of water 1.00 g/cm3.)
cooking oil (0.82 g/cm3)
balsa wood (0.12 g/cm3)
ethanol (0.798 g/cm3)
steel (7.18 g/cm3)
The upward force acting on an object submerged in a fluid is called:
drag
weight
pressure
upthrust
If a bicyclist travels 30 kilometers in two hours, her average speed is ____.
60Km/h
2Km/h
30Km/h
15Km/h
Speed equals distance divided by ____
velocity
motion
size
time
The force that pulls falling objects toward Earth is called:
resistance
acceleration
gravity
free fall
The SI unit of force is the:
meter
joule
kilogram
newton
A horizontal line on a distance-time graph means the object is:
moving at a constant speed
moving faster
at rest
slowing down
Which of these is an example of deceleration?
a roller coaster moving down a steep hill
an airplane following a straight flight path
a bird taking off for flight
a car approaching a red light
A car driver sees a rabbit on the road. The driver makes an emergency stop after he sees the rabbit.
The graph shows the speed of the car from the time the driver sees the rabbit until the car stops.
The distance traveled by the car from the first time the driver first sees the rabbit to when the car starts to slow down in:
average distance
braking distance
stopping distance
thinking distance
When an unbalanced force acts on an object, _____.
the object’s motion does not change
the motion of the object changes
the weight of the object decreases
the object accelerates
In science, a push or a pull on an object is called:
friction
pressure
force
gravitation
The force of gravity acting on an object is also known as:
impulse
mass
weight
gravity
The force of attraction between two objects is always known as:
electromagnetic force
air resistance
friction
gravitational force
What does speed measure?
(a)
Write three commonly used abbreviations for speed.
(a)
Two cyclists, Victoria and Laura, set off at 09:00 a.m. and head for the same final destination. Victoria takes the main highway which is 15km and arrives at 10:30 a.m. Laura takes the ring road, which is a distance of 22km, and arrives at 10:15 a.m. Work out the average speeds of the two cyclists.
VICTORIA:____; LAURA: ____.
(a)
Work out the missing values. Be sure to include units.
Distance = 130 miles Speed = ? Time = 2 hours
(a)
Work out the missing values. Be sure to include units.
Distance = 20 km Speed =? km/h Time = 15 minutes
(a)
Work out the missing values. Be sure to include units.
Distance = 60 miles Speed =? mph Time = 30 minutes
(a)
Which one of the below speeds is the fastest?
30 m/s
1800 m/minute
108,000 m/hour
946,080,000 m/year
(a)
Fill in the blank: (just write the two words, no need to write full sentence)
If forces are balanced, an object will be____ or travelling at a ____speed.
(a)
Fill in the blank: (just write the two words, no need to write full sentence)
Unbalanced forces lead to a change in ____(acceleration or deceleration) or in ____.
(a)
What is your weight on Earth if your mass is 45 kg? What is your weight on the moon if your mass is 45 kg? (answers must be written in the correct order to receive credit).
On earth:____; On the moon:____.（The force of gravity on the moon is 1.5m/s^2)
(a)
