Which of the following statements about mass is correct? a) 5 Kg b) Changes with gravity c) 10 Kg d) Depends on velocity

Mass is a fundamental property of an object that measures its inertia, or the amount of matter it contains. It does not change with location or gravitational field.

If the mass of a ball is 5 kg on Earth, its mass will remain 5 kg on Jupiter, or any other celestial body.

The correct option is (a).

Mass of the object $m = 10$ kg.
Velocity of the object $v = 10$ m/s.
The object is moving with a uniform velocity.

Uniform velocity means that the velocity is constant, so there is no change in velocity. Therefore, the acceleration $a = 0$ m/s$^2$.

The force acting on an object is given by $F = ma$.

The force acting on the object is 0 N.

The correct option is (c).

The kinetic energy ($KE$) of an object is given by the formula:

where $m$ is the mass and $v$ is the speed.

Let the initial speed be $v_1 = v$.
The initial kinetic energy is $KE_1 = \frac{1}{2}mv^2$.

The new speed is $v_2 = 2v$.
The new kinetic energy is $KE_2 = \frac{1}{2}m(2v)^2$.

When the speed is doubled, the kinetic energy is quadrupled.

The correct option is (b).