Random
Two trucks have the same mass of 1,300 kg. The first truck is moving with a velocity of 70 km/hour, while the second truck is moving with a velocity of 80 km/hour. Which truck has the greater momentum?
The second truck.
Gravity is ________ when objects are closer together.
stronger
What is the definition of energy?
Because of inertia
Does a marble have more energy when it is falling down through the air or rolling flat on the ground?
Falling through the air because it has more potential energy.
What keeps your shoes from sliding out from under you on a regular sidewalk?
In a roller coaster, potential energy will start to ______________ when it starts to go down, and kinetic energy will ____________.
decrease, increase
Newton's Cradle is an example of showing energy changing. What is this called?
Energy Transfer
When a hammer hits a nail, where is the potential energy?
Potential energy is found on the hammer because the person holding it has stored energy getting ready to hit the nail.
Rubbing your hands together very fast will produce what kind of energy?
heat
What does transforming energy mean?
Changing one energy from one type to another.
This force is a noncontact force that acts over a distance and pulls all objects toward each other.
Gravity
Name four types of other energy besides kinetic and potential energy.
sound, light, heat (thermal), wind, electrical
Friction usually ___________ with the roughness of a surface.
A) increases
B) decreases
C) stays the same
A) increases
In a car collision, kinetic energy can transfer into ___________________ energy.
Sound or Heat
When a baseball bat hits a ball. What kind of force just took place?
Contact Force
Magnetism. Magnets are drawn to each other and doesn't require to touch.
The pull of gravity between two objects depends on what two factors?
amount of matter in the objects & distance between the objects
When I turn on the lights in the classroom, what two types of energy has the electrical energy transformed to?
Heat and Light energy
What is it called when energy can't be created or destroyed. It can only change form.
Conservation of Energy