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- Q 1/7Score 0
A student plans to build a model rollercoaster for a science fair. The only energy for the car is the potential energy it contains. The student wants the car to roll from Point 1 to Point 2. Which design allows the car to roll to Point 2 by converting its potential energy into kinetic energy?
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- Q1
A student plans to build a model rollercoaster for a science fair. The only energy for the car is the potential energy it contains. The student wants the car to roll from Point 1 to Point 2. Which design allows the car to roll to Point 2 by converting its potential energy into kinetic energy?
30s - Q2
The picture shows a pulley. How does a pulley help make work easier?
It pushes materials apart.
It holds things together.
It reduces the friction.
It redirects the force.
30s7.P.2.2 - Q3
A certain type of hybrid car utilizes a braking system in which energy is recovered and stored in batteries. This is an example of which type of energy conversion?
chemical energy converted to kinetic energy
thermal energy converted to potential energy
kinetic energy converted to potential energy
chemical energy converted to thermal energy
30s7.P.2.2 - Q4
Our class is studying the amount of energy stored in objects. If the same rock is put in four different places, at which location will the rock have the most potential energy?
30s7.P.2.2 - Q5
A student uses the fulcrum and board shown below to move a large rock. The student's friends suggest ways to revise the design. Which suggestion best helps the student move the rock while using less force?
completely remove the fulcrum
apply force directly above the fulcrum
put the fulcrum on top of the board
move the fulcrum closer to the rock
30s7.P.2.4 - Q6
In order for electricity from a battery to power a light bulb, the wire has to provide the electricity a path to do what?
charge the air molecules near the circuit
jump from one battery terminal to the other
change the chemical properties of the wire
flow through the entire closed circuit
30s7.P.2.4 - Q7
An incandescent bulb placed in a closed circuit works by allowing electrons to travel through a very thin piece of wire in the bulb. The bulb will then give off infrared radiation. This is an example of:
electrical energy being transformed into mechanical energy
electrical energy being transformed in heat and light energy
magnetic energy being transformed into electrical energy
electrical energy being transformed into potential energy
30s7.P.2.4
