TEST SERIES - 58 (I)

A block of ice is floating in a glass containing water. When the ice melts completely, the level of the water in the glass will

• Rise

• Fall

• Not change

• None of the above

A steel ball is floating in a beaker containing mercury. If some water is poured in the beaker, the steel ball will

• Move up

• Move down

• Continue in its position

• Execute vertical oscillation

The pressure at the bottom of a liquid tank does not depend on

• Acceleration due to gravity

• Density of the liquid

• Height of the liquid

• Area of the liquid surface

A simple harmonic oscillator has time period T. The time taken by it to travel from the extreme position to half the amplitude is

• 6 T

• 4 T

• 3 T

• 2 T

Which of the following physical quantities do not have same dimensions?

• Force and Pressure

• Work and Energy

• Impulse and Momentum

• Weight and Force

If the momentum of a body is increased by 50%, its K.E. will increase by

• 100%

• 125%

• 150%

• 200%

A body is lifted by a man to height of 1 m in 30 seconds. Another man lifts the same mass to the same height in 60 seconds. The work done by them are in the ratio

• 1 : 2

• 1 : 1

• 2 : 1

• 4 : 1

A bag is dropped from an aeroplane flying horizontally at a constant speed. Neglecting air resistance, where will the aeroplane be when the bag reaches the ground?

• Directly above the bag

• Ahead of the bag

• Behind the bag

• Data is not sufficient

If a bomb dropped from an aeroplane explodes in mid-air

• Its KE increases

• Its total energy increases

• Its total energy decreases

• Its total momentum decreases

If the earth were to stop rotating, the value of ‘g’

• Increases

• Decreases

• Remain unchanged

• Becomes zero