Catpult

The catapult is an example of which of the following simple machines?

• lever
• wedge
• pulley
• wheel and axle

The force that pulls down on the projectile from a catapult is called ___________.

• Newton
• velocity
• gravity
• kilogram

A newton is a measure of _____________.

• distance
• mass
• force
• time

What is speed?

• how far you go
• how much distance is covered over a period of time
• how fast you accelerate
• the change in the location of a object

Speed is different from velocity because

• Velocity has a direction
• Speed uses Distance /Time
• Velocity doesn't include time
• Velocity doesn't include distance

A kilogram is _____ times larger than a gram.

• 10
• 100
• 1,000
• 10,000

Acceleration is a change in ________. 

• direction 
• speed 
• velocity 
• distance 

What part of the catapult held the most potential energy?

• The lever that launched the marshmallow.

• The marshmallow.

• The elasticity in the rubber bands of the catapult.

• The base of the catapult.

What was the proof that kinetic energy was released from the catapult?

• How still the catapult sat during the launch.

• The distance the lever could be pulled back to launch the catapult.

• The distance the projectile flew from the catapult.

• The force that the lever exerted on the marshmallow.

What is a lever?

• A lever is a stiff boards that is set on top of a thin edge. By pushing down with a force on one side, you can easily lift heavy objects.

• A lever is a flat supporting surface tilted ta an angle, with one end higher than the other.

• A lever is a simple machines that consists of a wheel attached to a smaller axle so that these two parts rotate together in which a fore is transferred fro one to the other.