Question

For each statement select True or False.

True False  A static body has energy but no kinetic energy.
True False  The lengths along the direction of motion of moving objects are shorter than when they are at rest.
True False  Relativistic effects are especially important when speeds are close to the speed of light.
True False  The mass of an atom does not change when it emits light.
True False  A moving clock runs slowly
True False  The total kinetic energy of a body is limited, since its speed can never exceed c.

Answer 1

A stationary body has rest mass energy. It is, E mc So, the statement is true. Length is contracted if the object is moving with relative speeds. That is the length is contracted along the direction of motion. So, the statement is true. The relativistic effects are present for small velocities, but the effect is very less to compare. So, the relativistic effects are especially important when speeds are close to the speed of light. So, the statement is true. The mass of the atom does not change when it emits light; the light is due to electron transitions from one energy level to another energy level. So, the statement is true. According to time dilation, the moving clock runs slowly. So, the statement is true. The statement is true. No object in the universe can move with greater speed than light velocity