

(1st Part) Newton's first law of motion states that an object at rest tends to stay at rest. While an object in motion tends to stay in motion unless an external force acts upon it. Two vehicles are planning to race on the highway. The Truck is on the left lane and the car is on the right lane.

While the vehicles are stopped the driver is at rest. The trees would be at rest as well. If you are driving, everything around you is in motion. If the car is at rest, everything around you is at rest.

(2nd Part)They start racing, since the truck is bigger you would have to try and go faster than the smaller car to beat that car in the race. The reason why is because of Newton’s second law. The greater the mass of the object being accelerated, the more force needed to accelerate that object. The mass of the bigger car would have to be smaller to be as fast as the smaller car.

Here’s an example, Trucks tend to weigh 6,000 pounds and a small car weighs an average of 4,079 pounds. The car would probably have the ability to go more MPH than the truck despite the trucks engine. The engine has to do more work because of the weight of the truck, it also means the gearing is configured for overcoming the inertia of a much heavier vehicle. Trucks are generally less aerodynamic, so top speed is limited. And the gearing has a huge impact as well.

Truck engines have heavier rotating components because they are needed to extend service life under hard conditions. That means the engine accelerates up to maximum RPM more slowly. And it means you can fit fewer gears in the gearbox, which means you have to have a shorter rear end gear, which limits top speed. A car weighing 1 ton with a 200 horsepower engine, would have a power to weight ratio of 200 horsepower per ton. A truck weighing 40 tons with a 500 horsepower engine would have a power to weight ratio of 12.5 hp/ton. So the car would have 16 times the power to weight ratio of the truck, therefore can accelerate much faster.

So next we're going to find the force of the truck and the car. The force of a truck that weighs 6,000 pounds and accelerates at a speed of 120 Mph is 720,000. The equation was F=6,000*120. The equation for the car is F=4,079*140. The force of a car that weighs 4,079 pounds and accelerates at a speed of 140 MPH is 571,060.

Even though the car has more speed, the truck has a greater mass which would make it slower. So this goes to show if you want a fast truck, get a smaller one for it can be quicker than a bigger one with greater mass. Also if you want a fast car, get an average sized car because it is probably quicker than the average size trucks.

(Part 3) Newton’s third law of motion is that for every force, there is an equal reaction force in the opposite direction. When they are racing, the car crashes into another car that is not racing. After the two cars crash the truck crashes.This is an example of the third law of motion.

It’s the third law of motion because the cars were going in opposite directions until the car that is racing goes out of control and then they crashed. Then the truck crashed into more cars that crashed into a field(kinda like a pool effect). Luckily no one was hurt. Next time could be different.

2 Cars 1 Highway
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