Chapter 2 Flashcards
A 2400-kg truck accelerates from 10 m/s to 30 m/s in 6 s. The net force on the truck is ________.
816 N
8000 N
12,000 N
78,400 N
8000 N
A car moving at 15 m/s comes to a stop in 10 s. Its acceleration is
-1.5 m/s2
-0.67 m/s2
0.67 m/s2
1.5 m/s2
-1.5 m/s2
A car starts from rest and reaches a speed of 12 m/s in 20 s. Its acceleration is
0.6 m/s2
4 m/s2
6 m/s2
240 m/s2
0.6 m/s2
A heavy object and a light object are dropped from rest at the same time in a vacuum. The heavier object will reach the ground
before the lighter object.
at the same time as the lighter object.
after the lighter object.
It depends on the shape of the object.
at the same time as the lighter object.
A kilometer is
0.001 m
10 m
100 m
1000 m
1000 m
A net force of 10 N gives an object an acceleration of 5 m/s2. What net force would give the same object an acceleration of 1 m/s2?
1 N
2 N
5 N
50 N
2 N
A person is 5 ft. tall. The SI equivalent of this height is
18.3 cm
183 cm
15.2 m
1.52 m
1.52 m
According to Newton’s third law of motion,
there is no such thing as a single force acting on an object
for every force there is an equal and opposite reaction force
action and reaction forces need not be equal, but must act in opposite directions
action and reaction forces do not exist, it is a government plot
for every force there is an equal and opposite reaction force
An airplane travels at constant speed for a distance of 160 km in a time of ½ hour. Its speed is
80 km/h
160 km/h
320 km/h
640 km/h
320 km/h
Gravity is an attractive force between
all massive objects.
Earth and objects on Earth.
Earth and Moon, and objects on Earth.
all objects everywhere.
all objects everywhere.
Ignoring air resistance, the velocity of a falling object
is constant.
is constantly increasing.
increases for a while, then becomes constant.
depends on the mass of the object.
is constantly increasing.
In 5 min a person running at 10 km/hr covers a distance of
500 m
600 m
833 m
1200 m
833 m
In the equation v = d/t, t represents _________________.
time.
instantaneous speed.
distance.
constant speed.
time.
The British unit of length closest to the cm is the
inch
foot
yard
mile
inch
The acceleration of gravity near the surface of Earth is 9.8 m/s2.
TRUE
The mass of a sack of potatoes whose weight is 200 N is
20.4 kg
91 kg
210 kg
440 kg
20.4 kg
The momentum of an object remains the same unless an unbalanced force acts on it.
TRUE
The newton is a unit of
motion.
energy.
power.
force
force
The smallest of the following units is the
cm3
Liter
quart
0.25 gallons
cm3
The tendency of a moving object to remain in unchanging motion in the absence of an unbalanced force is called
inertia.
free fall.
acceleration.
impulse.
inertia.
The weight of a 60-kg person is
6.1 N
60 N
69.8 N
588 N
588 N
The weight of an object
is the same everywhere in the universe
depends only upon its mass
depends only upon the acceleration of gravity
depends upon both its mass and the acceleration of gravity
depends upon both its mass and the acceleration of gravity
