201.

The motion of a freely falling body is an example of .......... motion.

• uniformly accelerated

• non-uniformly accelerated

• constant velocity

• constant speed

A ball rolling along the ground gradually slows down and finally comes to rest is due to.............

• friction

• magnetic force

• electrostatic force

• muscular force

The angle between the ........... and the incident ray is called the angle of incidence.

• surface

• normal

• tangent

• reflected ray

For an object, the state of rest is considered to be the state of ............. speed.

• increasing

• decreasing

• inverse

• zero

The laws which govern the motion of planets are called.............

• Newton's Laws

• Kepler's Laws

• Avogadro's Laws

• De Morgan's Laws

The substances which have very low ignition temperature and can easily catch fire with a flame are called ........... substances.

• hazardous

• perilous

• incombustible

• inflammable