Which has greater kinetic energy a car travelling at 30 km h or a half as massive car travelling at 60 km h?

Which has greater kinetic energy a car travelling at 30 km h or a half as massive car travelling at 60 km h?

Expert-Verified Answer Where Ek = kinetic energy, m = mass, v = velocity. Ek = 450m J. Ek = 900m J. Thus , the car travelling at 60 km/hr at half mass has a greater kinetic energy to the car traveling at 30 km/hr at full mass.

How can you tell what has the greatest kinetic energy?

The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.

Which would have greatest kinetic energy?

Solids have the lowest kinetic energy whereas gases have the highest kinetic energy.

Which situation does not describe an acceleration?

Which situation does not describe an acceleration? A car travelling with constant speed on a straight road.

What is the kinetic energy at 30 mph?

Kinetic Energy = ½ X mass X speed2 The differing speeds past point B can be said to be caused by speed alone. At 30mph our kinetic energy will be 30 X 30 = 900.

Does it take more energy to go from 0 to 30 or 30 to 60?

For the intermediate questions: yes, it takes more energy accelerating from 30 mph to 60 mph than from 0 mph to 30 mph. And yes, both a stationary person and a person in the vehicle would agree that it takes 450 units of energy to accelerate from 0 to 30 mph.

What are 6 examples of kinetic energy?

• A roller coaster car in descent.
• An airplane in flight.
• A flowing river.
• Riding a bike.
• Wind.

What’s the formula for kinetic energy?

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

What are two examples of kinetic energy?

A person walking, a soaring baseball, a crumb falling from a table and a charged particle in an electric field are all examples of kinetic energy at work.

Which has the lowest kinetic energy?

As a result, gases have the highest kinetic energy, liquids have a lower kinetic energy, and solids have the lowest kinetic energy.

What are the two main forms of energy?

• Potential energy.
• Kinetic energy.

What has the lowest kinetic energy?

The particles of a solid are packed tightly together, and they vibrate in place. These vibrations are small, so the particles don’t move much, meaning they have the least kinetic energy compared to the other states of matter. On the other hand, gas has the highest kinetic energy.

When I drive my car at 30 miles per hour it has more kinetic energy than it does at 10 miles per hour?

When I drive my car at 30 miles per hour, it has more kinetic energy than it does at 10 miles per hour. True because KE=1/2mv^2, the kinetic energy increases with any increase in velocity.

What has more kinetic energy mass or speed?

Objects with greater mass can have more kinetic energy even if they are moving more slowly, and objects moving at much greater speeds can have more kinetic energy even if they have less mass. We must consider both the speed and mass of objects when considering the outcomes of collisions.

What has more kinetic energy mass speed or length?

The amount of kinetic energy in a moving object depends directly on its mass and velocity. An object with greater mass or greater velocity has more kinetic energy. You can calculate the kinetic energy of a moving object with this equation: KE = ½mv2 where m is mass and v is velocity.

How does the kinetic energy of a vehicle traveling at 60 mph when compared to the same vehicle traveling at 30 mph?

A car traveling at 60 mph has four times the kinetic energy of an identical car traveling at 30 mph, and hence the potential for four times more death and destruction in the event of a crash. Kinetic energy must always be either zero or a positive value.