4G-SC-Collisions Flashcards
An encounter between two objects is called a ___________. After the encounter, there is a change in energy.
Collision
What is kinetic energy?
The energy an object has when it is in motion
What is mass?
A measure of the amount of matter in an object
What does the amount of kinetic energy in an object depend on?
The objects’ mass and speed
If a 7-pound bowling ball and a 1-pound basketball are rolling along at the same speed, which ball has more kinetic energy?
bowling ball
Which of the following is an example of a collision that does not cause damage?
A pencil writing on a piece of paper
In a collision between a car and a truck, why does the car have more damage?
The truck had more kinetic energy, which was transferred to the car.
Automobile accidents is an example of _____________.
hard collisions
If you rub your hands together, why do they get warm?
Some of the kinetic energy is converted to heat energy.
What is friction?
A force that occurs when two objects touch
What is a collision?
An encounter between two objects
The more ________ in an object, the more kinetic energy it has.
mass
If two 7-pound bowling balls are rolling along at different speeds, does the faster one or the slower one have more kinetic energy?
faster
Why is there more damage in an accident with fast moving cars than with slow moving cars?
Because there is more kinetic energy in the fast moving cars
In a collision, kinetic energy _____________.
is transferred from one object to another
In a collision, some kinetic energy that is transferred is converted to _______ and _______ energy.
heat and sound
All collisions ________ cause damage.
do not
If two objects have the same mass, does the faster one or the slower one have more kinetic energy?
faster
If two objects are moving at the SAME speed, the one with more mass has ______ kinetic energy than the one with less mass.
more
Faster moving objects lead to a greater potential to cause damage in collisions because
Faster moving objects have more kinetic energy
When you rub your hands together, why do they make a “swish, swish” sound?
because kinetic energy is turned into sound energy
If your pencil rests on paper, is it colliding with the paper?
no
If your pencil is writing on paper, is it colliding with the paper?
yes
If a truck collides with the car, which vehicle will be more damaged?
car
Which has more kinetic energy, if their speed is the SAME, a car or a truck?
truck
Objects with more ________ have more kinetic energy, leading to greater potential to cause damage in collisions.
mass
Slower moving objects have _______ kinetic energy than faster moving objects.
less
Writing with a pencil is an example of __________.
soft collision
In automobile accidents kinetic energy causes _________ and _________.
movement and damage
In a collision, the amount of ___________ energy that each object has affects the result of the collision.
kinetic
Which car will have more kinetic energy, a faster one or a slower one?
faster
