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WorksheetsCh. 3 TEST - Newton's 2nd Law
Total questions: 44
Worksheet time: 22mins
The rate at which velocity changes with time (the change may be in magnitude, direction, or both).
acceleration
air drag
volume
terminal velocity
weight
The force due to gravity on an object.
acceleration
air drag
volume
terminal velocity
weight
Frictional resistance due to motion through air
acceleration
air drag
volume
terminal velocity
weight
The quantity of space an object occupies.
acceleration
air drag
volume
terminal velocity
weight
Motion under the influence of gravitational pull only.
acceleration
air drag
free fall
terminal velocity
weight
Terminal speed with the direction of motion (downward for falling objects)
acceleration
air drag
free fall
terminal velocity
weight
The resistive force that opposes the motion or attempted motion of an object past another with which it is in contact, or through a fluid.
terminal speed
inertia
friction
mass
inversely proportional
the speed at which the acceleration of a falling object terminates because air resistance balances its weight
terminal speed
intertia
friction
mass
inversely proportional
The property of things to resist changes in motion.
terminal speed
inertia
friction
mass
inversely proportional
When two values change in opposite directions (e.g., one value increases, the other decreases)
directly proportional
inertia
friction
mass
inversely proportional
When two values change in the same direction (e.g., one value increases, the other increases),
directly proportional
inertia
friction
mass
inversely proportional
What is the approximate acceleration of a free-falling object?
14 kg
16 m/s^2
10 m/s
10 m/s^2
The more mass an object has, the more __________ it has.
velocity
acceleration
mobility
inertia
What is the mathematical formula used when studying Newton’s second law of motion?
y = mx + b
2πr
A = F ÷ M
A = M ÷ F
What two principal factors affect the force of air drag on a falling object?
speed and volume
speed and surface area
mass and speed
mass and volume
When a 15-N falling object encounters 10 N of air resistance, its acceleration is _______________. (g = the acceleration of objects due to gravity)
less than g
g
more than g
not enough information
The scientist who discovered the connection between force, mass, and acceleration was ____________.
Galileo Galilei
Sir Isaac Newton
both
neither
If the net force acting on a sliding block is tripled, by how much does the acceleration increase?
1/3 as much
stays the same
double
triple
Which of the following controls on an automobile affect acceleration?
gas pedal
brakes
steering wheel
all of the above
What does it mean to say that net force is directly proportional to acceleration?
Acceleration can change net force.
When net force increases, so does acceleration.
When net force increases, acceleration decreases.
Net force is the only thing that affects acceleration.
What is the acceleration of a car that travels in a straight line at constant speed?
0 m/s
0 m/s^2
6 m/s^2
22 m/s^2
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. Three seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
4 m/s^2
5.5 m/s^2
6 m/s^2
22 m/s^2
What is meant by free fall?
An object falling through the air.
An object with no forces acting on it.
An object under the influence of gravity only.
Why doesn’t a heavy object accelerate more than a light object when both are freely falling?
Both objects have the same force/mass ratio, so they have the same acceleration.
Gravity pulls on each object with the same amount of force.
Heavy objects DO fall faster than light objects when in free fall.
Heavy objects are slower because they have more mass, so light objects actually fall faster.
Falling objects drop with an average acceleration of 10 m/s². If an object falls from a tall building, how long will it take before it reaches a speed of 50 m/s? (Ignore air resistance.)
10 seconds
10 meters
5 seconds
Objects cannot reach that speed because of terminal velocity
What happens to your weight when your mass increases? (assuming gravity is present)
it decreases
it stays the same
it increases
it becomes the headline on the cover of People magazine
Which of these scenarios results in the greatest amount of acceleration?
A net force of 20 N acts on a mass of 10 kg.
A net force of 30 N acts on a mass of 18 kg.
A net force of 40 N acts on a mass of 30 kg.
A net force of 50 N acts on a mass of 32 kg.
What are the three kinds of changes in motion that can occur with acceleration?
sine, cosine, or tangent
mass, inertia, or volume
phase, color, or type
speed, direction, or both
On a long alley, a bowling ball slows down as it rolls. Is any horizontal force acting on the ball? What is that force called?
No, no force
Yes, friction
Yes, inertia
Yes, power
An object with a larger mass means that it has a larger volume.
true
false
Suppose you exert a horizontal push on a crate that rests on the floor and it doesn’t move. How much friction acts compared to your push?
less than your push
equal to your push
greater than your push
Suppose you exert a horizontal push on a crate that rests on the floor and it doesn’t move. If you increase your push and it still doesn’t move, will the friction also increase?
Yes, the friction also increases
No, the friction does not increase
Suppose you apply the same amount of force to two carts: one cart has a mass of 3 kg and the other has a mass of 6 kg. Which cart will accelerate more?
They will accelerate at the same speed
the 3 kg cart
the 6 kg cart
Suppose you apply the same amount of force to two carts: one cart has a mass of 3 kg and the other has a mass of 6 kg. How much greater will the acceleration be for the 3 kg cart?
1/2
2 times
1/3
3 times
Why does an empty tin can accelerate more than a tin can full of rocks when kicked with the same amount of force?
The empty can has less mass, so it will accelerate more.
The empty can is hollow, so it will roll more.
The can full of rocks becomes a maraca.
