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WorksheetsForces and interactions review
Total questions: 24
Worksheet time: 18mins
Match the vocab word and the correct definition.
collision
2+ things exerting force on each other
vector
quanitity that has magnitude & direction
force
push or pull, accelerates the object
momentum
p=mv
crumple zone
area that deforms during collision
A 5 kg object is moving at 5 m/s. What is its momentum?
5 kg* m/s
1 m/s
25 kg * m/s
25 m/s
How could you domonstrate momentum?
2 ice skaters push off each other in opposite directions
throwing a ball
a car driving and going into neutral
rolling down a hill
What is the overall force acting on an object when all individual forces are combined?
accaleration
impulse
momentum
net force
When the mass of an object is doubled while the net force acting on it stays the same, what happens to the object’s acceleration?
it stays the same
in increases by 2
it's halved
it goes to 0
When an object is accelerating at a constant rate, what happens to the net force if the mass of the object is increased?
net force increases
net force stays the same
acceleration has to increase
net force decreases
If there's 0 net force on a system, what happens to the momentum?
momentum changes
mass changes
objects stop moving
momentum stays the same
Match the vocab word and definition.
Newton's 2nd law
force equals the mass times acceleration
vector
has magnitide and velocity
acceleration
velocity changing over time
What can change an objects momentum? (there's more than 1 correct answer)
mass
velocity
acceleration
force
What is the main goal of designing a device to minimize the force on an object during a collision?
increase the object's speed
increase time of collision
make the object heavier
decrease the object's velocity
What happens to the force expereinced when the time of a collision is increased?
force increases
force stays the same
force decreases
force becomes 0
What is the purpose of a crumple zone? (there is more than 1 correct answer)
absorb energy
protect the car
reduce force on the passangers
slow the car down
How do you solve for total momentum?
p=mv
p=(mv)*(mv)
p=(mv)+(mv)
p=m/v
What factors should you consider then degisning a collision minimizing device? (there's more than 1 correct answer)
energy absorbtion factor
has a crumple zone
durable
bulky
Match the correct vocab word and definition.
magnetic force
attratcion or repulsion
conductor
material allows flow of electric charge
electric current
the flow of electric charge
Newton's Law of Gravitation
F = G m1 m2/ r^2
Match the correct vocab word and definition.
magnetic field
region around the magent, can feel force
flux
amount of magnetic field passing through
electric charge
property of matter
Coulomb’s Law
F = k* q1 q2/ r^2
How can you create a magnetic field using an electric current?
coil of wire and battery
a magnet
circut and a conductor
a spinning wheel
When an electric current flows through a wire, what happens?
creates a gravitational field
makes the wire magnetic
produces heat in the wire
creates a magnetic field aound the wire
How does distance of objects affect gravitational or electrostatic force?
force increases as distance increases
force decreases as distance increases
force stays the same as distance decreases
force increases as distance stays the same
What is Coulomb's law about?
force between 2 objects, because of their charge
force between two objects
force between 2 objects, because of mass
speed of objects in a magnetic field
What's Newton's Law of Gravitation about?
the speed the objects fall to the ground
energy produced from the movement of the objects
something with temperature and mass of the objects
force between 2 object because of their masses and distance
In a lab, if you're testing strength of magnetic fields created, what variables would you change? (there's more than 1 correct answer)
current strength
type of magnet
wires
distance from the magnet
When distance in halved between 2 objects, what happens to the force?
force stays the same
force decreases by 2
force increases by 2
force increases by 4
How can you measure a magnetic field?
a battery
a compass or sensor
a magnet
a ruler
