# How do you build a catapult for a physics project?

1. Stack five craft sticks together and wrap a rubber band around each end.
2. Stack two craft sticks and wrap a rubber band around only one end.
3. Slide the five sticks in-between the two sticks, as shown.
4. Wrap a rubber band where the two sections meet to hold the catapult together.

## What are the physics behind a catapult?

Catapults operate using projectile motion, which is a form of science called Physics. Catapult physics is basically the use of stored energy to hurl a projectile (the payload). The three primary energy storage mechanisms are tension, torsion, and gravity.

## What is the best catapult design?

The Trebuchet: The Trebuchet was one of the more accurate and efficient types of catapult used in ancient times. It worked by using the energy of a falling counterweight to rotate a beam around a pivot resulting in the release of whatever projectile was loaded into the sling at the other end of the beam.

## What are the 4 types of catapult?

The main types of catapults used were the trebuchet, mangonel, onager, and ballista.

## What is the best launch angle for a catapult?

A 45-degree angle is the best angle to maximize the efficiency of your catapult. The arm break can be made of the same material that comprises the frame of your catapult. It should run across the widths of the base and be in position to make contact with the catapult arm.

## Which force is used in catapult?

Catapults: Catapults take advantage of elastic force, involving stretched, compressed, bent, or twisted material. To prepare a catapult to launch a rock, it takes work to twist a rope (provide torsion), to stretch a rubber band (provide tension), or bend wood.

## How do you calculate the force of a catapult?

For example, a distance of 100 meters at 10 seconds is: vh = 100/10 = 10 m/s. So, if the projectile took 5 second to reach maximum height: vv = (9.8)(5) = 49.4 m/s.

## What are 5 types of catapults?

The main types of catapults used were the trebuchet, mangonel, onager, and ballista.

## How do you make a strong catapult?

To build a strong catapult, build a base supported with plywood triangles, with a cross brace at the top. Attach a launching basket to the throwing arm, and attach the arm to the base at one end with a long piece of rope that is wrapped through the frame and around the arm in an over-under-over pattern.

## How does a catapult work step by step?

1. Pull the arm back (rope in case of Ballista)
2. Place missiles in bucket, sling, or nook.
3. Release potential energy. Work is done on the arm.
4. Arm collides with with base and is brought to an abrupt stop.
5. Missiles retain the kinetic energy from the work done on the arm.

## How do you calculate the distance a catapult will throw something?

The equation for the distance traveled by a projectile being affected by gravity is sin(2θ)v2/g, where θ is the angle, v is the initial velocity and g is acceleration due to gravity.

## What type of catapult launches the farthest?

• 3 Main Types of Catapults.
• The 3 Main Types of Catapults are: Ballista:
• Mangonel: The Mangonel is the most iconic type of catapult and is what most people think of when they think of a catapult.
• Trebuchet: The Trebuchet was designed for max power and distance.

## Does the length of a catapult arm affect distance?

Overall, as the arm length of the catapult increased, the ball was thrown farther.

## Why is 45 degrees the best launch angle?

As ball speed increases, so does the drag force and the lower is the required launch angle. A launch at 45 degrees would allow the ball to remain in the air for a longer time, but it would then be launched at a lower horizontal speed at the start and it would slow down more because of the longer flight time.

## What is the range of a catapult?

Catapults can launch things a fair distance — 500 to 1,000 feet (150 to 300 meters) is common. It is surprising how much energy they can store.

## What is the purpose of a catapult?

The catapult was an ancient siege machine that could hurl heavy objects or shoot arrows with great force and for considerable distances. Some catapults could throw stones weighing as much as 350 pounds for distances greater than 300 feet.

## Why is 45 degrees maximum range?

The sine function reaches its largest output value, 1, with an input angle of 90 degrees, so we can see that for the longest-range punts 2θ = 90 degrees and, therefore, θ = 45 degrees. A projectile, in other words, travels the farthest when it is launched at an angle of 45 degrees.

## How does gravity affect the catapult when in use?

The catapult applies a force to the object in both the horizontal (forward) and vertical (upward) directions, and gravity pulls the object vertically downward.

## How does a catapult get its energy?

The launch arm is a lever that rests on a fulcrum. The catapult works when the potential energy stored in a stretched rubber band is converted to kinetic energy when it snaps back to its loose shape, moving the catapult arm—and the projectile!

## What class lever is a catapult?

A mangonel catapult works just like a third-class lever. The base of the catapult acts as the fulcrum which the catapult arm pivots on. In this case, the force is provided by tension in string. The load acts as the projectile in the bucket.

## What is the end of a catapult called?

It takes a hundred different forms. One’s the catapult — a lever with two unequal arms. At the end of the short arm is either a rope or a large counterweight. At the end of the long arm is a sling.

## How do you calculate the projectile motion of a catapult?

1. Equation 1: df=di+vit+12at2.
2. Equation 2: vf=vi+at.
3. Equation 3: v2f=v2i+2a(df−di)
4. Equation 4: df=di+12(vf+vi)t.
5. Equation 5: x(t)=x0+vx,0t+12axt2.
6. Equation 6: x(t)=vx,0t.
7. Equation 7: vx,0=v0cos(θ) v x , 0 = v 0 cos ⁡
8. Equation 8: x(t)=v0cos(θ)t x ( t ) = v 0 cos ⁡