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WorksheetsForces and Motion
Total questions: 30
Worksheet time: 15mins
Aristotle thought that the rate of falling objects...
depends on mass
was the same for all objects
depends on size
none of the above
Galileo discovered that objects of different mass fall ...
at the same rate if air resistance is the same for both objects
at different rates if air resistance is the same for both objects
at opposite rates if air resistance is the same for both objects
at a constant speed if air resistance is the same for both objects
What is the force that opposes the motion of objects through air called?
terminal velocity
free fall
projectile motion
air resistance
What feature of an object does NOT affect air resistance?
size
shape
speed
chemical properties
When air resistance exactly matches the downward force of gravity, a falling object stops accelerating and reaches ____________.
free fall
terminal velocity
centripetal force
projectile motion
Which of the following is an example of projectile motion?
crate sliding on the ground
car traveling down the highway
ball that is thrown in the air
fish swimming in water
In what directions is a projectile accelerated?
vertically downward
vertically upward
horizontally forward
both vertically and horizontally
Only in a vacuum or in space can an object be in ______________, which means only gravity is acting on the object.
free fall
terminal velocity
momentum
projectile motion
What is the path of one object around another in space called?
terminal velocity
free fall
projectile motion
orbit
Why do astronauts in space appear weightless?
there is not gravity in space
air resistance opposes gravity
they have no mass in space
they are in free fall along with the space ship they are occupying
The unbalanced force that causes objects to move in a circular path is called a _____________________
free fall
centripetal force
inertia
momentum
Which is a common unbalanced force acting on objects in motion?
mass
acceleration
friction
speed
Who's laws are we studying?
Newton's
Krohn's
Kruger's
Perry Police Department
According to Newton's first law of motion, a moving object that is not acted on by an unbalanced force will...
remain in motion
eventually come to a stop
change its momentum
accelerate
An object at rest tends to remain at rest. This property is called __________________.
mass
inertia
momentum
acceleration
Newton's 2nd law describes the relationship between ...
Force, mass and acceleration
Acceleration, Speed and Velocity
actions and reactions
objects at rest and objects in motion
What happens to the acceleration of an object if you add more mass and apply the same force?
The object accelerates the same
The object accelerates slower
The object accelerates faster
The objects accelerates in the opposite direction of the force applied
What is the acceleration of a 50 kg object pushed with a force of 500 N?
10 m/s2
2500 m/s
10 m/s
2500 m/s2
This law states that whenever one object exerts a force on a 2nd object, the 2nd object exerts an equal and opposite force on the 1st object. Which law is it?
Newton's 1st law
Newton's 2nd law
Newton's 3rd law
none of the above
Newton's 3rd laws can be summarized as...
Inertia
F=ma
All forces act in pairs (action/reaction)
Speed limit: 55 mph
A rocket being propelled upward is an example of which law?
Newton's 1st law
Newton's 2nd law
Newton's 3rd law
Newton's 4th law
The law of conservation of momentum states that when two objects collide, their combined momentum
increases after the collision
remains the same after the collision
decreases after the collision
cannot be determined after the collision
When a train increases its velocity, its momentum
decreases
remains constant
increases
is transferred to its surroundings
How much momentum does a stationary 5500 kg mass have?
5500 kg m/s
0 kg m/s (momentum requires mass and velocity)
5500 N
none of the above
The momentum of a car traveling in a straight line at 20 m/sec is 24,500 kg•m/sec. What is the car’s mass?
1225 N
1225 kg
490,000 N
490,000 kg
