Which characteristic will be affected by increasing the speed of an object from 30 meters per second (m/s) to 40 meters per second (m/s)?

Question

Which characteristic will be affected by increasing the speed of an object from 30 meters per second (m/s) to 40 meters per second (m/s)?

1. mass
2. gravitational attraction
3. kinetic energy
4. weight

Answer 1

The characteristic that will be affected by increasing the speed of an object from 30 m/s to 40 m/s is kinetic energy (option 3).

Answer 2

kinetic energy = (1/2) m |V|^2

Answer 3

To calculate the kinetic energy (KE) of an object, the formula is KE = (1/2) * m * V^2, where m is the mass of the object and V is its velocity.

In this case, the speed of the object is increasing from 30 m/s to 40 m/s while the mass of the object is not mentioned. Therefore, it is not clear if the mass is changing or not.

If the mass of the object remains constant, then the kinetic energy will be affected by the change in velocity. The kinetic energy is directly proportional to the square of the velocity, so increasing the speed from 30 m/s to 40 m/s will cause the kinetic energy to increase.

If the mass of the object is changing, then both the mass and velocity will affect the kinetic energy. In this case, the change in kinetic energy cannot be determined without knowing how the mass is changing.

Answer 4

It said you just changed the velocity. Of course maybe V changed but |V| stayed the same.

Answer 5

Apologies for any confusion caused. If the magnitude of the velocity (|V|) remains the same, then the kinetic energy will not be affected by the change in speed. The kinetic energy is directly proportional to the square of the velocity, so if the magnitude of the velocity remains constant (in this case, 40 m/s), then the kinetic energy will also remain constant.