Q: Which car has more momentum a car with the speed of 20 km per h or a car moving at 100 km per h?

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The formula is...momentum=velocity x massSo...momentum= 4m/s x 100kgmomentum= 400 kg m/s

First of all, a football player who's moving at 7 miles per second has more to worryabout than his momentum. That's 25,200 miles an hour, and if somebody doesn'tgrab him, and his helmet doesn't burst into flame from the atmospheric friction,he's going to leave the end-zone and go into low-earth orbit.But we'll just do the math.Momentum = (mass) x (speed)which is easy enough, but we have to make sure that all the units are in the samesystem. Right now they're not, so we have to remember to convert that "7 miles"into meters.Momentum = (100 kg) x (7 mi/sec) x (1,609.344 meter/mile) = 1,126,540.8 kg-m/secThat's roughly the same momentum as a 28-ton truck moving at 100 mph.

The speed after 100 seconds is: speed =1000m/s + 4m/s^2x100s= 1000m/s + 400m/s=1400 m/s.

We have to assume that both bodies are initially moving along the same straight line in opposite directions, so the collision is "head on". We also have to assume that the collision is "elastic", meaning that none of the original kinetic energy is lost to heat. The final momentum is 20 Kg-m/s in the direction opposite to the original 80 kg-m/s motion.

If you want to have that in meters per second square, convert the speed to meters per second (divide by 3.6 in this case). Then, divide the speed by the time.

Related questions

The magnitude of momentum is directly proportional to speed. A car moving at 100 km per hr has 5 times as much momentum as a car with equal mass moving at 20 km per hr has.

The oil ship would have more momentum than the car because momentum is calculated as mass multiplied by velocity. Even though the car is moving faster, the oil ship's larger mass would result in greater momentum.

An object at rest. Actually that's the only possible example for a single object. For two objects, you can have objects moving in opposite directions; for example, one may have a momentum of +100 units, and the other, a momentum of -100 units.

The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the momentum of the object would be 100 kg m/s (10 kg x 10 m/s).

A small object can have the same momentum as a large object if the small object is moving at a significantly higher velocity than the large object. Momentum is the product of an object's mass and velocity, so a small object with a very high velocity can have the same momentum as a large object moving at a lower velocity.

An object with a large mass moving at a high velocity will have the largest momentum relative to the Earth. For example, a spacecraft traveling at high speed would have a significant momentum relative to the Earth.

The momentum of an object is given by the product of its mass and velocity. In this case, the 3000 kg mass moving at 0.2 m/s has a big momentum because both its mass and velocity are relatively large. The momentum of an object is a measure of its motion and its resistance to changes in motion.

A moving automobile would have a greater momentum than a heavy truck at rest. Momentum is the product of mass and velocity, so even if the truck has more mass, the automobile's momentum would be greater due to its velocity.

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The momentum of the 20 kg body moving at 5 m/s is greater since momentum is calculated by multiplying mass and velocity. In this case, momentum = mass x velocity. Thus, 20 kg x 5 m/s = 100 kg m/s, which is greater than the momentum of the 10 kg body moving at 10 m/s (10 kg x 10 m/s = 100 kg m/s).

The formula is...momentum=velocity x massSo...momentum= 4m/s x 100kgmomentum= 400 kg m/s

I believe at higher speeds there will be more air resistance.