ICSE Physics Class 7 Notes Chapter 2 Motion

→ Motion – Motion is the change in position with respect to a set of stationary landmarks.

→ Types of motion are translatory, rotatory and oscillatory.

→ A body is said to move in a translatory motion if the whole body moves through the same distance in the same interval of time.

→ A body is said to be in rotatory motion if it moves about a fixed point without changing the radius of its motion.

→ A body is said to be in oscillatory motion if it moves to and fro about its mean position.

→ A body is said to be in vibratory motion if the body moves to and fro in a particular style.

→ Oscillation of pendulum is one complete to and fro motion.

→ The maximum displacement on either side of a mean position is called amplitude.

→ A motion which repeats itself at regular intervals of time is called periodic motion.

→ A physical quantity which has only magnitude and no direction is called a scalar quantity.

→ A physical quantity which has magnitude as well as direction is called a vector quantity.

→ Speed is the distance travelled per unit time. It is a scalar quantity.

→ The displacement per unit time is known as the velocity of the body. It is a vector quantity.

→ The rate of change of velocity is called acceleration. It is a vector quantity.

→ Frequency is the number of complete oscillations in one second.

→ Unit of frequency is Hertz.

→ Motion is of two types –
(a) uniform
(b) non-uniform motion.

ICSE Class 7 Physics Notes

Leave a Reply

Your email address will not be published. Required fields are marked *