In uniform circular motion, the linear velocity is perpendicular to
A. Radius
B. Force
C. Radius vector
D. Momentum
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Flywheel is an important part of a steam engine because it :
A. Accelerates the speed of the engine
B. Helps the engine in keeping the speed uniform
C. Decreases the moment of inertia
D. Gives strength to the engine
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The following particles move with same kinetic energy. Which of them has maximum momentum ?
A. Electron
B. Proton
C. Deutron
D. Alpha Particle
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Should cars have bumpers that collapse under impact?
A. Yes, since the offending car should get damaged and pay for the mistake
B. No, since it would be very expensive to get the car repaired
C. No, since the colliding car would then ram into the occupants and kill them
D. Yes, since they help to absorb the impact of a collision and keep the occupants safe
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When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ?
A. Four times
B. Two times
C. Half
D. One-fourth
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The odometer guage indicates
A. The distance travelled by a vehicle
B. The depth of the ocean
C. Pitch length
D. Frequency of the wave
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If a force acts upon two objects at rest, and having different masses for the same amount of time, then which one of the following will be the same for both the objects?
A. Acceleration
B. Kinetic Energy
C. Velocity
D. Momentum
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Consider the following statements : 1. There is no net moment on a body which is in equilibrium. 2. The momentum of a body is always conserved. 3. The kinetic energy of an object is always conserved. Which of the statements given above is/are correct?
A. 1, 2 and 3
B. 2 and 3 only
C. 1 and 2 only
D. 1 only
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The rate of change of linear momentum of a body falling freely under gravity is equal to it's ________ ?
A. Kinetic Energy
B. Weight
C. Potential Energy
D. Impulse
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According to the theory of relativity, which of the following always remains constant ?
A. Length of an object
B. Time
C. Space
D. Velocity of light
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Which of the following is a result of Surface tension ?
A. Gravitational pull
B. Viscosity
C. Capillary action
D. Radiation
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A liquid disturbed by stirring comes to rest due to
A. Density
B. Surface tension
C. Viscosity
D. Centripetal force
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A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by
A. Decreasing the radius of the capillary tube
B. Increasing the radius of the capillary tube
C. Increasing the height of water in the vessel
D. None of these
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Oil rises up the wick in a lamp because
A. Oil is very light
B. Of the diffusion of oil through the wick
C. Of the surface tension phenomenon
D. Of the capillary action phenomenon
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An ice block with a piece of lead embeded in it floats in water. If ice melts the water level
A. Rises
B. Falls
C. Remains same
D. Falls first and then rises
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The surface tension of water on adding detergent to it
A. Increases
B. Decreases
C. No change
D. Becomes zero
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A bottle of sodalime is grasped by the neck and swung briskly in a vertical circle, Near which portion of the bottle do the bubbles collect?
A. Near the bottom
B. In the middle of the bottom
C. Near the neck
D. Bubbles remain distributed uniformly
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Which liquid is the most viscous?
A. Water
B. Diesel
C. Milk
D. Oil
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Rain drops acquire spherical shape due to
A. Viscosity
B. Surface tension
C. Friction
D. Elasticity
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The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by
A. Bernoulli's principle
B. Magnetic properties of the ship's material
C. Newton's third law of motion
D. Earth's gravitational force
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