Physics-Objective Related Question Answers
76. An influence that changes the state of rest in a straight line of a body is called?
Force F= ma [m = mass; a = acceleration]
77. Unit of Force is?
Newton or Kg m/s2
78. CGS unit of Force is -?
Dyne
79. Strongest force in the universe is?
Nuclear force
80. Weakest force in the universe, ?
Gravitational Force
81. Force acting for a short time?
Impulsive force
82. Force which acts on a body moving in a circular path and it is directed towards centre is called?
Centripetal force
83. The force required by a Vehicle moving round a curved road is?
Centripetal force
84. Force that acts on a body moving in a circular path and is directed away from the centre is called?
Centrifugal force
85. The force that helps to separate cream from milk is?
Centrifugal force
86. Capability of rotating objects around a fixed axis is called?
Torque
87. Force that resists the movement of one surface over another is called?
Frictional Force
88. The substances which reduce the frictional force between moving surfaces?
Lubricants eg : Grease; Oil; Graphite
89. Force acts in a direction opposite to the direction of motion is?
Static friction
90. Force occurs when two objects are moving relative to each other or rub together is?
Kinetic friction
91. Force acts when two bodies role one another?
Rolling friction
92. Force of attraction between unlike molecules is termed as?
Adhesion
93. Water drop sticks on glass surface is an example of ….force?
Adhesion
94. Force of attraction between like molecules is termed as?
Cohesion
95. Water molecules join together is an example of ….force?
Cohesion
96. Frictional force acting between parallel layers of a liquid is called?
Viscosity
97. Unit of viscosity is?
Poise
98. With increase in temperature, viscosity .?
Decreases
99. Viscosity of gas is less than viscosity of?
Liquid
100. Viscosity of an ideal fluid is?
Zero
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