STEM

What is the elastic power?

• The ability of a material to return to its original shape after being stretched or compressed.

• The force of gravity acting on an object.

• The ability of a material to change its color when heated.

• The ability of a material to conduct electricity.

What is the fixed point around which a lever rotates?

• Load

• Effort

• fulcrum

What is friction?

• A type of force

• A type of energy

• A type of motion

• A type of sound

When you release a stretched rubber band, it converts its stored elastic potential energy into ________________ energy.

In a first-class lever, the fulcrum is located _______ the load and effort.

If the surface is _______, it makes less friction.

In STEM, if you want to make the elastic power vehicle to move faster, what do you have to do?

• push the vehicle with more force

• attach the elastic band more firmly

• Stretch the elastic band more in order to gain more kinetic energy

• use multiple elastic band in short distance so that it can get more force

where should we put effort?

• 5 and 3

• 1 only

• 1 and 4

• only 2

if you put 2 red bush beside the wheel tightly, the stem car will move faster.

• True

• False

When you release the wound-up rubber band attached with the gear block , the potential energy in the rubber band is converted into ____________ energy.

• elastic

• kinetic

• thermal

• potential