Unit 3/4 Checkpoint Kahoot Flashcards
According to conservation of momentum, if two objects collide in the absence of any other forces…
The total momentum will not change
Which type of energy transform does NOT occur in a wind turbine?
CHEMICAL TO ELECTRICAL
Which wind turbine spins faster capturing more energy & uses less materials to lower cost?
SINGLE TURBINE
What causes a ball to accelerate down the ramp?
FORCE
Hot particles moving quickly have ____ thermal energy
a lot
Heat transferred by hot particles moving up and cold particles sinking is…
convection
Which statement explains what would happen if hot object was placed into cold liquid?
Temp of the water will INCREASE and temp of object DECREASES.
The energy transfer by hot particles moving in a LIQUID or GAS is?
convection
convection
Closer to the Earth’s surface
Single wind turbine (less blades) reduces DRAG, which _________ speed of rotation.
INCREASES
Which formula calculates acceleration? (Force & Mass not given)
final velocity - initial velocity/time
Calculate acceleration: Truck starts from rest accelerates to 18 m/s (West) in 4.5 seconds. A = Vf - Vi/ t
4 m/s2
If an object’s mass is increased but the net force stays the same, the acceleration will…
decrease
What happens to the momentum of a bowling ball when it hits stationary bowling pins?
momentum is transferred to pins
Crumple Zones…
protect the passengers by absorbing the energy
decrease the force experienced by the driver
increase the time taken to decrease force
