CH 13 MOTION AND TIME CLASS 7 NCERT

Determine the number of seconds there in a day.(Hint : 1 day = 24 hrs , 1 hour = 3600 sec)

• 50000 SEC

• 86400 SEC

• 72000 SEC

• 90000 SEC

How many Jantar Mantars are there in India ?

• 1

• 2

• 3

• 5

Choose the different types of graphs .

• Pie Chart

• Histogram

• Bar Graph

• None of these

A simple pendulum takes 42 sec. to complete 20 oscillations. What is its time period?

The correct symbol to represent the speed of an object is:

• 5 m/s

• 5 s/m

In a simple pendulum, the metallic ball suspended by thread is called its …………………

• Bob

• Ball

• bon

All the clocks make use of some periodic motion.

• True

• False

Time period of a simple pendulum depends upon its

• weight of bob

• length

• both a and b

• none of these

The distance-time graph for the motion of an object moving with a constant speed is a …………………

• Straight line

• Zig-zag line