PHYSICS IX CHAPTER 2

 $172\ kmh^{-1\ \ \ }\ in\ \ \ \ ms^{-1\ \ \ \ }is\$  

• 47.77

• 619.2

• 17.2

• 1720

Change in position is called

• Speed

• Velocity

• Displacement

• Distance

An object starting from rest falls vertically downwards. After ...... seconds its velocity will be $57\ ms^{-1}$  

• 34

• 11

• 57

• 5.7

Which is vector quantity

• Displacement

• Velocity

• Acceleration

• All

A car starts from rest. It acquires a speed of  $35ms^{-1}$   after 7s. Distance moved by car will be....m

• 175

• 5

• 122.5

• 245

Slope of distance-time graph determines magnitude of

• speed

• acceleration

• displacement

• None

An object is dropped from height of 100m, its height after 2s will be......m

• 20

• 80

• 50

• 10

A stone is dropped into a well, it hits bottom of well with velocity of  $27ms^{-1}$  . Depth of well is......m

• 36.4

• 27

• 270

This graph represents

• Rest

• Constant Speed

• Increasing speed

Brownian Motion is ....... motion of particles

• circular

• random

• vibratory