# How does Newtons 3rd law apply to a mousetrap car?

Newton’s Third Law Its K’nex axle and string attached to our mousetrap increase leverage and tension, providing a larger net force. All of these factors contribute to the faster acceleration of our car. The relationship between an object’s mass m, its acceleration a, and the applied force F is F = ma.

## What is the physics behind a mousetrap car?

The mousetrap storespotential energyin the form of the spring. That potential energy is converted into kinetic energy in the form of the arm rotating forward. The arm pulls on the wound-up string, which turns the drive wheel dowel, which is connected to the wheels, which makes the car drive forward.

## How does Newtons law apply to a mousetrap car?

The mouse trap car relates to Newtons first law because the car does not move until the force of the mousetrap moves it and then it doesn’t stop until it hits something or until gravity finally stops it. – Newtons second law: Acceleration is produced when a force acts on a mass.

## What makes a mousetrap car go farther?

Using large rear wheels allow one rotation of the axle to take the car a much further distance. In other words, a given length of the string from the mousetrap moves the car a greater distance. The last note is to place your mousetrap as close to the front of the car as possible.

## How does a mousetrap car adapt to speed?

By changing the size of the drive wheel(s) you can speed-up or slow-down your mousetrap vehicle. Larger drive wheels have a greater travel distance per each turn compared to smaller drive wheel. As the size of the drive wheel increase the torque required to start a wheel turning also increase.

## What is the equation for figuring out your speed with the mousetrap car?

The work done on the mousetrap arm is found using the formula W = F  d, where F is the force (in Newtons) applied to the mousetrap car spring arm and d is the distance (in m) through which the force is applied.

## How do mousetrap cars reduce friction?

Try to have a minimum gap of 1/8 inch between the frame and any spacers (or wheels) in order to decrease any rubbing friction. Use thrust washers and graphite powder between spacers (or wheels) and the frame to help reduce the rubbing friction.

## What is the effect of using large or small wheels on a mousetrap car?

By changing the size of the drive wheel(s) you can speed-up or slow-down your mousetrap vehicle. Larger diameter drive wheels have a greater travel distance per each turn than compared to smaller diameter drive wheels.

## How does a mousetrap car move?

Power to drive the wheels is provided by a mousetrap to which a wand and string is attached to the snap arm. Winding the string around the axle pulls back the snap arm and releasing the snap arm pulls the string, turning the wheels.

## What kind of lever is a mousetrap car?

A mousetrap would be considered a third-class lever. Like everything, you can not get something for anything and energy is no different when it comes to a machine. You can only get the same amount of energy out of a machine as you put into the machine.

## What two types of friction affect a mousetrap car?

This energy is used to overcome friction and propel the vehicle. The less friction acting against a moving mousetrap car, the less energy that is consumed to friction and the further that the vehicle will travel. A moving mousetrap car is affected by two type of friction: airfriction and bearing friction.

## What is Newton’s third law?

Newton’s third law simply states that for every action there is an equal and opposite reaction. So, if object A acts a force upon object B, then object B will exert an opposite yet equal force upon object A.

## What is the most important thing to keep in mind when designing a mousetrap car?

Axle Points The number one point of friction on any mousetrap car is where the axle system comes in contact with the frame of the vehicle. In most cases an axle will be in direct contact with the frame and there is a lot that can be done to decrease the friction at this contact point.

## What kind of string is best for a mousetrap car?

The string has to be strong enough to handle the pulling force but flexible and thin enough to wind tightly around the drive axle. We recommend using a Kevlar based fishing line because its high strength. You should stay away from nylon fishing line and dental floss, these do not work well with mousetrap racers.

## How does the length of the lever arm affect a mousetrap car?

Lever Arm Basics Making the length of the mouse trap’s lever arm longer will decrease the pulling force but increase the amount of string that can be pulling from the drive axle. Shortening the length of the lever arm increases the pulling force but decrease the amount of string that can be pulled from the drive axle.

## How do you make a mousetrap car go faster and farther?

To adapt your mousetrap car for distance, use large, light wheels for less friction and greater inertia. For example, old CDs make great wheels to increase distance. If your car is a rear-wheel drive car, set the wheels on a narrow rear axle so the wheels turn more and travel further.

## How do you make a mousetrap car go uphill?

Increase the size of the axle. The greater the ratio of the diameter of the axle to the wheel, the less force will be required to accelerate the car. In other words, you should match a larger axle with a smaller wheel to increase acceleration.

## How do you make a mousetrap car reverse?

To make a reversing mousetrap car go forward and then come back you will need to know how to “back-wind” the string. Back-winding the string it a technique where you first wind the string around the axle in one direction and then rewind the string in the opposite direction.

## How does acceleration affect a mousetrap car?

The first advantage is that it prevents slipping of the drive wheel on the ground/floor as the car accelerates. The second advantage is that the car takes longer to gain speed (accelerate) which results in it traveling farther than a car that gains speed faster.

## Is friction important in a mousetrap car?

Without friction your mousetrap vehicle would travel forever, learn how to conquer friction. You cannot build a winning mousetrap racer until you know the basics. Perhaps the second most important concept to understand when building a mousetrap powered car is the concept of friction.

## What is friction in a mousetrap car?

Friction. Friction: the force that opposes the relative motion of two surfaces in contact. Friction will slow– and eventually stop– your mousetrap car. Friction occurs between the wheels and the floor and between the axle and the chassis.

## Are big wheels better for a mousetrap car?

Larger drive wheels will have a greater travel distance per each turn compared to smaller drive wheel. It would make sense to use a super huge drive wheel so for each turn of this massive drive wheel the mousetrap vehicle will travel an incredible distance.

## What simple machines are in a mousetrap car?

The six simple machines are: the inclined plane, the wedge, the screw, the lever, the wheel and axle, and the pulley. Understanding the principles of these simple machines will help you design your mousetrap vehicle.