Catapults

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

• lever
• wedge
• pulley
• wheel and axle

The first step in the scientific method is asking a ________.

• conclusion
• data
• experiment
• question

After asking a question, the scientist makes an educated guess or a _______.

• variable
• factor
• hypothesis
• conclusion

Before conducting an experiment, we must first develop a _______.

• guess
• plan
• request
• problem

This is a picture of a ___?

• catapult
• trebuchet
• sling shot
• bow and arrow

What is a catapult?

• A Medieval device used to hurl projectiles at long range.
• A device used on an aircraft to launch airplanes
• A device used to repel cats from eating birds
• A new type of cell phone

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

The property responsible for the rubber band's ability to stretch and then return to its normal state and to propel the catapult's firing arm is known as _______________.

• resistance
• torsion
• tension
• elasticity

Which launch angle produces the greatest range?

• 45 degrees
• 60 degrees
• 75 degrees
• 90 degrees