Increasing the speed of an object from 30 meters per second to 40 meters per second will affect its kinetic energy.
Kinetic energy (KE) is given by the formula:
\[ KE = \frac{1}{2} mv^2 \]
where \(m\) is the mass of the object and \(v\) is its speed. Since the speed is increasing, the kinetic energy will increase as well due to the square of the velocity being a factor in the equation.
The other characteristics mentioned—gravitational attraction, weight, and mass—are not directly affected by just changing the speed of the object.