What is Motion?

• A body is said to be at rest if its position does not change with time with respect to an observer (a reference point).

• A body is said to be in motion if its position changes with time with respect to an observer (a reference point).Motion means movement.

Which of the following is the example of rest??

• The passengers sitting in a moving bus are said to be in motion with respect to an observer standing outside the bus.

• Circular movement of blades of a rotating fan.

• The passengers sitting in a moving bus are said to be at rest with respect to the driver of the same bus because their position do not change with respect to the driver. A book lyin

• Spinning of top on its own axis.

Rectilinear motion is also called??

• Linear

• Rotatory

• Curvilinear

• Spinning

If a body as a whole moves in such a way that every point on it moves the same distance in a given time, then it is said to have undergone which motion?

• Translatory motion

• Rectilinear motion

• Curvilinear motion

• Oscillatory motion

What do you mean by Rotatory motion??

• If a body moves about a fixed point without changing its position

• If a body as a whole moves back (to) and forth (fro) about its mean position

• If a body moves along a curved line

• If a body keeps changing its motion rapidly from one type to another

If a body repeats its motion at regular intervals of time, then it is said to be in_____________motion.

• Non-periodic

• Periodic

Vibrating strings of guitar undergo which motion?

• Vibratory motion

• Periodic motion

• Translatory motion

• Rectilinear motion

If a body as a whole moves back (to) and forth (fro) about its mean position, then it is said to be in_____________motion.

• Oscillatory motion

• Vibratory motion

____________________travelled is the actual length of the path covered by a moving object irrespective of its direction of travel.

• Distance

• Displacement

If a line of a motion is curved then the body exhibits:-