501. A meteor of mass m enters the earth’s atmosphere at an angle θ to the horizontal with an initial velocity v. Which of the following is true about the vertical component of its velocity?
A. It remains constant throughout the motion
B. It increases throughout the motion
C. It decreases throughout the motion
D. None
502. The K.E of a light and a heavy object is the same. Which object has the maximum momentum?
A. Light object
B. Heavy object
C. Both have the same momentum
D. Data is not sufficient
503. For the same velocity, the momentum is maximum for:
A. An electron
B. A proton
C. A deuteron
D. An alpha particle
504. The escape velocity of the moon in Kms-1 is:
A. 1.23
B. 2.43
C. 2.38
D. 2.59
505. The work done in taking a particle from the floor to a table depends on:
A. The actual path taken
B. The time taken in this work
C. The speed of the particle
D. The height of the table
506. The earth is held in place by the atmosphere by:
A. Winds
B. Gravity
C. Clouds
D. The rotation of the earth
507. The Escape velocity of Earth in Kms-1:
A. 9.75
B. 11.2
C. 12.3
D. 15.6
508. The initial velocity at which a body rises and never descends is known as:
A. Kinetic energy
B. Terminal velocity
C. Escape velocity
D. Extreme velocity
509. The total frictional drag F experienced by a boat traveling through still water at constant speed v is. What is the power developed by the boat?
A. 0.5 FV
B. FV
C. 0.5 FV^2
D. FV^2
510. A bullet is shot from a rifle. As a result, the rifle recoils. The kinetic energy of the rifle as compared to that of the bullet is:
A. Less
B. Greater
C. Equal
D. Cannot be concluded
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