121. The Bernoulli’s equation is based on the:
A. Law of conservation of energy
B. Law of conservation of mass
C. Law of conservation of motion
D. Third law of motion
122. The rain drop falling from the sky reach the ground with:
A. Constant terminal velocity
B. Constant gravitational acceleration
C. Variable acceleration
D. Variable speed
123. If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity:
A. V/A = Constant
B. A/V = Constant
C. AV= Constant
D. None
124. Which of the following substances has high resistance to flow?
A. Honey
B. Thick tar
C. Mobile oil
D. All of these
125. Substance which flows easily are:
A. Water
B. Kerosene oil
C. Petrol
D. All of these
126. A flowing liquid possesses:
A. K.E
B. P.E
C. Pressure energy
D. All of them
127. The drag force increases at the speed of the object:
A. Decreases
B. Increases
C. Decreases rapidly
D. None of these
128. At terminal velocity, fluid friction is:
A. Maximum
B. Minimum
C. Zero
D. Decreasing
129. As the droplet accelerates, the net force acting on it is:
A. Increase
B. Decreases
C. Zero
D. None of these
130. The value of g at moon’s surface is 1.6 ms⁻². The mass of 100kg body on the surface of the moon will be?
A. 100 N
B. 160 N
C. 1000 N
D. 1600 N
Admin