About 700-800 kilos.
ANSWER: I'm assuming by "mousetrap" car, you mean small car. Probably pretty obvious at that point that your car would have a.....small mass.
because the force the drives it
because it has greater mass
A good average weight for a car is 1000kg, but with a range from 500kg for a small car, to maybe 2000kg or more for a hummer.
The larger car has greater inertia because inertia is directly related to an object's mass. As mass increases, so does inertia. Therefore, the larger car moving at the same speed as the smaller car would have greater inertia.
Momentum is a function of velocity and mass, therefore, assuming a "large" bus has more mass than a "small" car the bus would have more momentum since the velocities are the same.
a matter of mass
A Boeing 747 aircraft has a mass of approximately 400,000 kilograms. A typical small car has a mass of around 1,500 kilograms. The Earth has a mass of about 5.972 × 10^24 kilograms. An elephant can have a mass of up to 6,000 kilograms.
A large truck typically has more inertia than a small car because inertia is directly proportional to an object's mass. The greater mass of the truck means it will resist changes in its state of motion more than the smaller car.
This observation can be explained by Newton's second law of motion, which states that the force required to accelerate an object is directly proportional to its mass. A smaller car has less mass, so less force is needed to get it moving compared to a larger car.
/2mv^2 where m is mass and v is velocity. The fuel used is proportional (in a simplified view) to the kinetic energy of the car. Therefore if cars are to driven at the same speed (and ignoring the individual efficiencies of different models) the car that has a larger mass uses more fuel to get to and maintain the same speed
The truck - greater mass.