A car travels 200 m in 4 s. Its average speed is ____ m/s.
100
800
50
0
196
The acceleration of an object speeding from rest to 20 m/s in 5 s is:
1 m/s2
2 m/s2
3 m/s2
4 m/s2
5 m/s2
The slope of a d-t graph gives the __________.
acceleration
speed
distance
position
none of the above
The slope of a v-t graph gives the __________.
acceleration
speed
distance
position
none of the above
The area under the line of a v-t graph gives the __________.
acceleration
speed
change in position
position
none of the above
__________ can be read directly from a v-t graph.
acceleration
speed
distance
position
none of the above
__________ can be read directly from a d-t graph.
acceleration
speed
displacement
position
none of the above
__________ can be read directly from an a-t graph.
acceleration
speed
distance
position
none of the above
The area under the line of an d-t graph gives the __________.
acceleration
final speed
distance
position
none of the above
The area under the line of an a-t graph gives the __________. [Think of the units of the vertical axis (a) multiplied by the horizontal axis (t)]
acceleration
change in speed
change in position
position
none of the above
The area under the line of a-t graph divided by the change in time gives the __________.
average acceleration
speed
distance
position
none of the above
The total area under the line of v-t graph divided by the change in time gives the __________.
acceleration
average speed
distance
position
none of the above
The rise divided by run of a d-t graph gives the __________.
acceleration
speed or velocity
distance
position
none of the above
The rate of change of speed can be called the __________.
acceleration
speed
distance
position
none of the above
The rate of change of position can be called the __________.
acceleration
speed
distance
position
none of the above
The change of position can be called the __________.
acceleration
speed
distance
position
none of the above
Which of the following are vector qualities?
acceleration
speed
distance
position
none of the above
A car travels 90 km/h for 4 s. Find the distance traveled.
100 km
360 m
100 m
0 m
none of the above
A car travels 27.8 m/s for 2 h. Find the distance traveled.
100 km
200 km
55.6 m
200160 km
none of the above
A car travels 27.8 m/s on a trip of 200 km. Find the elapsed time.
1 h
2 h
7.2 s
0.5 h
none of the above
A car travels 50 km in 2 h. Find the speed.
100 km/h.
100 m/s.
25 m/s.
6.9 m/s.
none of the above.
A car accelerates from 10 m/s to 25 m/s in 5 s. Find the acceleration.
5 m/s2.
2 m/s2.
15 m/s2.
3 m/s2.
none of the above.
A car accelerates from 10 m/s to 25 m/s in 5 s. Find the average speed.
5 m/s.
20 m/s.
17.5 km/h.
63 km/h.
none of the above.
A car accelerates from 10 m/s to 25 m/s in 5 s. Find the distance traveled.
87.5 m.
125 m.
25 m.
from here to eternity.
none of the above.
A car accelerates from 10 m/s at 20 m/s2. If it traveled 120 m, find the time interval.
1 s
2 s
3 s
4 s
none of the above
A car accelerates from rest at 2 m/s2. If it traveled 120 m, find the time interval.
1 s
2 s
3 s
4 s
none of the above
A car accelerates from rest at 20 m/s2. If it traveled 160 m, find the time interval.
1 s
2 s
3 s
4 s
5 s
A car is traveling +10 m/s accelerates at -20 m/s2. After 2 s the car's velocity is:
50 m/s.
30 m/s.
-30 m/s.
-50 m/s.
none of the above.
A car traveling +10 m/s accelerates -20 m/s2. After 2 s the car's displacement is:
-80 m.
-20 m.
0 m.
-30 m.
none of the above.
A car traveling +10 m/s accelerates -20 m/s2. After 3 s the car's displacement is:
-80 m.
-20 m.
0 m.
-30 m.
none of the above.
A car accelerates from 10 m/s to 25 m/s in 1 s. Find the distance traveled.
17.5 m
25 m
35 m
15 m
250 m
A car travels 50 km in 1 h. Find the speed.
50 m/s.
100 m/s.
13.9 m/s2.
6.9 m/s.
none of the above
A car travels 50 km in 1 h. Find the speed.
50 km.
100 m/s.
25 m/s2.
13.9 m/s.
none of the above
A car accelerates from 10 m/s to 25 m/s in 5 s. Find the acceleration.
5 m/s2.
3 m/s2.
15 m/s2.
3 m/s.
none of the above.
A car accelerates from 10 m/s to 25 m/s in 5 s. Find the acceleration.
5 m/s2.
2 m/s2.
15 m/s2.
3 m/s.
none of the above.
A spider crawls in straight lines several times. It travels 2 cm and then 3 cm. The displacement:
is 5 cm.
is 1 cm.
is between -5 cm and 5 cm.
is between 1 cm and 6 cm.
is scary.
A annoying insect crawls in straight lines several times. It travels 3 cm and then turns a right angle and goes 4 cm. The magnitude of the total displacement:
is 5 cm.
is 1 cm.
is between -5 cm and 5 cm.
is between 1 cm and 6 cm.
is 7 cm.
A spider crawls in straight lines several times. It travels 3 cm and then turns a right angle and goes 4 cm. The magnitude of the total distance:
is 5 cm.
is 1 cm.
is between -5 cm and 5 cm.
is between 1 cm and 6 cm.
is 7 cm.
Pythagoras Theorem can only be used with ______ triangles.
right
left
three-sided
obtuse
acute
Which of the following statements is correct?
Vectors can be added arithmetically.
All vector quantities have magnitudes.
All scalar quantities have directions.
Circular acceleration is a scalar quantity.
The scalar equivalents of a vector quantities are equal.
Of the following units, which could be associated with a vector quantity?
meters
hours
quarts/second
kilograms
litres
The number of cubic centimetres in a cubic kilometre is 1 x 10 ____. (give exponent)
5
9
12
15
18
100 km/h is the same as ____ m/s.
100
50
28
14
1
The minimum number of unequal displacements whose vector sum can equal 0 is
1
2
3
4
5
Which of the following pairs of displacements can be added to give a resultant displacement of 2 m?
1 m and 1 m
2 m and 2 m
1 m and 3 m
both (a) and (c)
all of the above
A 10-N force and a 5-N force are attempting to crush MMK's nose. The resultant force on the proboscis must be:
between 5 and 10 N
between 5 and 15 N
more than 5 N
more than 10 N
more than 15 N
Ang walks 8 km north, then 5 km in a direction 60o east of north. Her resultant displacement from her starting point is:
11 km
13 km
12 km
14 km
3 km.
An airplane travels 100 km to the north, then 200 km to the east. The displacement of the airplane from its starting point is (accurate to two significant figures)
100 km
200 km
220 km
300 km
none of the above
An airplane travels 100 km to the north and then 100 km to the east. What heading would be needed to reach its destination in a straight flight?
22o
45o
50o
63o
90o
On a position-time graph, a horizontal straight line corresponds to motion at:
zero speed.
constant speed.
increasing speed.
decreasing speed.
infinite speed
On a velocity-time graph, a straight line sloping upwards to the right corresponds to motion at:
zero speed.
constant speed.
increasing speed.
decreasing speed.
infinite speed
Rafik travels 12 km in 40 min. His average speed is:
0.3 km/h
18 km/h
8 km/h
8 m/s
60 miles/h.
On a velocity-time graph, the motion of a car traveling along a straight road with the uniform acceleration of -2 m/s2 would appear as a:
horizontal straight line.
straight line sloping upward to the right.
straight line sloping downward to the right.
curved line with increasing downward slope to the right.
curved line whose increasing upward slope to the right.
Rob test drives a car that travels at 40 km/h for 2.0 h, at 50 km/h for 1.0 h, and at 20 km/h for 1.0 h. His average speed is:
31.4 km/h
38 km/h
45 km/h
55 km/h
none of the above.
MMK takes 0.1 s to throw a tomato at a compost pile, which leaves his hand with a speed of 30 m/s. The tomato's acceleration was:
3 m/s2
30 m/s2
300 m/s2
3000 m/s2.
produced. (get it?)
A SAM teacher's car has an acceleration of 2 m/s2. How long does the car take to go from 10 m/s to 30 m/s as it careens out of the parking lot?
10 s
20 s
40 s
400 s
15 s.
A volleyball spiked by Drew undergoes a constant acceleration of 6 m/s2 starting from rest. In the first second it travels:
3 m
6 m
18 m
36 m
1.5 m
A 1 kg stone is dropped from a cliff. After it has fallen 14.7 m its kinetic energy is:
17 m/s
27 J
44 J
144 kg
144 J
When an object undergoes acceleration,
its mass always increases
its speed always increases
it always falls toward the earth
a force always acts upon it
it always slows down
A force acts on an object that is free to move. If we know the magnitude and the direction of the forces and the mass of the object, Newton's second law of motion enables us to determine the object's ___.
weight
position
speed
acceleration
size
Which of the following is not a unit of mass?
the gram
the kilogram
the pound
the milligram
the tonne
A sheet of paper can be withdrawn from under a bottle of milk without toppling it if the paper is jerked out quickly. This is an example of:
inertia
weight
acceleration
the third law of motion
magic
The weight of an object:
is the quantity of matter it contains.
refers to its inertia.
is basically the same quantity as its mass but expressed in different units.
is the force with which it is attracted to the earth.
is always 9.8 times its mass.
An automobile that is towing a trailer is accelerating on a level road. The force that the automobile exerts on the trailer is:
equal to the force the trailer exerts on the automobile.
greater than the force the trailer exerts on the automobile.
equal to the force the trailer exerts on the road.
equal to the force the road exerts on the trailer.
non-existent.
The action and reaction forces referred to in Newton's third law in motion:
The action and reaction forces referred to in act upon the same object.
act upon different objects.
need not to be equal in magnitude but need to have the same line of action.
must be equal in magnitude but need not to have the same line of action.
are fictitious forces.
To set an object in motion on a surface usually requires:
less force than to keep it in motion.
the same force as that to keep it in motion.
more force than to keep it in motion.
only as much force as is needed to overcome inertia.
The frictional force between two surfaces in contact does not depend on:
the normal force pressing one against the other.
the areas of the surfaces.
whether the surfaces are stationary or in relative motion.
whether a lubricant is used or not.
all of the above are equally important
When a 1-N force acts on a 1-kg object that is able to move freely, the object receives:
a speed of 1 m/s.
an acceleration of 0.102 m/s2.
an acceleration of 1 m/s2.
an acceleration of 9.8 m/s2.
a big surprise.
The weight of 600g of salami is:
0.061 N.
5.9 N.
61 N.
5880 N.
0
A certain force gives a 5-kg object an acceleration of 2.0 m/s2. The same force would give a 20-kg object an acceleration of:
0.5 m/s2
2.0 m/s2
4.9 m/s2
8.0 m/s2
0
A 2400-kg car accelerates from 10 m/s to 30 m/s in 6 s. The force of the car is:
816 N
8000 N
12,000 N
78,400 N
from the Jedi mind control
The coefficients of static and sliding friction for wood on wood are respectively 0.5 and 0.3. If a 100-N wooden box is pushed across a horizontal wooden floor with just enough force to overcome the force of static friction, its acceleration is:
0.2 m/s2
0.5 m/s2
2.0 m/s2
5.0 m/s2
0
When an object undergoes an acceleration,
its mass always increases
its speed always increases
it always falls toward the earth
its kinetic energy changes
it is doing work
Which of the following is not a specific form of energy?