Time & Motion Class 7 by Neha Talwar

Name the time measuring devices used in earlier time

• Stop Watch & Pendulum Clock

• Atomic Clock & Quartz watches

• Sundial & Water Clock

Time Period of a Pendulum depends on

• Weight of bob & length of pendulum

• Length of Pendulum & Acceleration due to gravity

• Amplitude of an Oscillation

If 20 oscillations are covered in 10 seconds , what is its time period

• 2 secs

• 1 Secs

• 1/2 Secs

01 Solar Day has how many seconds

• 86,400 Secs

• 3600 Secs

• 52,900 Secs

Time calculation in CD - ROM is done by

• Microsecond

• Nanosecond

• Millisecond

A train covers 360km in 6 hours . What is the speed of the train

• 120km/hr

• 60km/hr

• 45km/hr

Average Speed covered by a body is equal to ratio of

• Instant distance travelled to instant time

• Average Distance Travelled to Average Time Taken

• Total Distance Travelled to Total Time taken

In a Distance - Time Graph, if the Graph shows line parallel to x axis, what type of motion does a body has

• Uniform Motion

• Non- Uniform Motion

• Body is at rest

Unit of Frequency is

• Pascal

• Hertz

• Newton

Dutch Scientist who invented a Pendulum Clock was

• Galileo Galilei in 1602

• Christiaan Huygens 1656

• Louis Essen and Jack Parry in 1955