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WorksheetsCH 3 - Forces and Momentum
Total questions: 62
Worksheet time: 51mins
force that opposes the motion of objects that move through the air
air resistance
force
gravity
inertia
a force that is directed toward the center of a curved or circular path
centripetal force
inertia
gravity
net force
a push or a pull exerted on an object
force
field
weight
friction
force that opposes the sliding motion between two touching surfaces
friction
net force
field
air resistance
attractive force between two objects that depends on the masses of the objects and the distance between them
gravity
net force
weight
air resistance
tendency of an object to resist any change in its motion
inertia
gravity
free fall
terminal velocity
states that if no external force acts on a group of objects, their total momentum does not change
law of conservation of momentum
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
states that an object moving at a constant velocity keeps moving at that velocity unless an unbalanced force acts on it
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Law of Conservation of Momentum
the maximum speed an object will reach when falling through a substance, such as air
terminal velocity
air resistance
weight
centripetal force
gravitational force exerted on an object
weight
free fall
gravity
terminal velocity
Using the gravity of earth at 9.81 m/s2 , how much does a person with a mass of 35 kg weigh in Newton's?
0.28 N
343 N
3.57 N
212 N
A 20 kg bike accelerates at 10 m/s2. what was the force?
25 Newtons
20 Newtons
200 Newtons
10 Newtons
If an object was accelerating at 10 m/s2, and a force of 35 newtons was required to accelerate it, what was the object's mass?
3.5 kilogram
350 kilograms
0.35 kilograms
35 kilograms
Which of the following is the formula for momentum?
p = mv
M = mv
F = ma
g = mc2
Which of the following is the unit for momentum?
kg·m/s
kg·m
kg·m/s2
Momentum has no unit.
Calculate the momentum of a 55-kg running back moving forward at 10 m/s.
550 kg·m/s
-550 kg·m/s
5.5 kg·m/s
-5.5 kg·m/s
What must be the mass of a bowling ball rolled at 13 m/s if it has 42 kg⋅m/s of momentum?
3.2 kg
0.31 kg
546 kg
334 kg
A dart with a mass of 0.5kg is thrown at 15m/s and sticks into a 1kg apple hanging on a string. What is the velocity of the dart and apple just after the dart is embedded? Inelastic Collision
0 m/s
5 m/s
10 m/s
15 m/s
A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball.
55 kg⋅m/s
100 kg⋅m/s
250 kg⋅m/s
500 kg⋅m/s
How does inertia change as mass increases?
Inertia would increase
Inertia would Decrease
Mass has no effect on inertia
It would depend on the acceleration
Why does a feather fall slower than a brick?
Because it is lighter
Because it is heavier
Because it is less dense
Because it has more air resistance and a lower terminal velocity
What states that "every object in the universe attracts every other object"?
Law of Universal Gravitation
Newton's First Law of Motion
Law of Universal Attraction
Inertia & gravity
How can friction be reduced?
reduce the Normal force acting between the 2 surfaces
reduce the roughness of the 2 surfaces coming in contact
use wax, grease or oil (lubricants)
all of the above are ways of reducing friction
This car is turning, but there’s a puddle of water in the road. Which diagram best shows how the puddle will affect the path of the car after it hits the puddle?
Which of the following best describes two surfaces that are in contact with each other but are not in motion?
kinetic friction
static friction
Which type of friction has the exerts the greatest force?
Sliding
Rolling
Static
Sticky
What is the centripetal force acting on a satellite orbiting the Earth?
Tension
Inertia
Gravity
Acceleration
Why do astronauts appear to be weightless in space?
They are weightless, no gravity in space
They are in a state of constant free-fall
They aren't totally weightless, just in micro-gravity
Space is made up by NASA, so astronauts are just in a gravity blocking bunker
What is the unit of Force?
m/s
kg x m/s
kg x m/s2
kg
The Net Force acting on an object is proportional to both the mass and the resultant acceleration of that object. (F = m x a)
Newton's First
Newton's Second
Newton's Third
Newton's Universal Gravity
If a bowling ball and feather are dropped from the same height in the absence of air, what will happen?
The feather will hit the ground first
The bowling ball will hit the ground first
They will hit the ground at the same time
They will both float in the air
When a force is exerted on an object, an equal and opposite force is exerted by the object. These forces are referred to as ______________?
Centripetal Forces
Frictional Forces
Gravitational Forces
Action-Reaction Forces
Why would a real rocket taking off have more momentum compared to a model rocket (even when they have the same velocity)?
The real rocket has greater acceleration
The model rocket has greater acceleration
The real rocket has greater mass
The model rocket has greater mass
Which of the following does NOT affect air resistance?
speed of an object
shape (surface area) of an object
density of air
mass of the object
If the rocket has a mass of 5 kg, the gasses have a mass of 0.5 kg and there is 1,500 N of force being exerted, what is the acceleration of the gas?
750 m/s2
149.5 m/s2
3,000 m/s2
7,500 m/s2
If the rocket has a mass of 5 kg, the gasses have a mass of 0.5 kg and there is 1,500 N of force being exerted, what is the acceleration of the rocket?
750 m/s2
300 m/s2
3,000 m/s2
7,500 m/s2
If the rocket has a mass of 5 kg, the gasses have a mass of 0.5 kg and there is 1,500 N of force being exerted, why does the rocket accelerate less?
The fins slow it down
The gasses have significantly less mass
Because its the action force not the reaction force
The gasses are assisted by gravity
