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1. The tides raise the mater in the see roughly in a day___________________?
A. once
B. twice
C. four time
D. eight time
2. The highest value of escape velocity in solar system is planet____________________?
A. Earth
B. Neptune
C. Jupiter
D. Moon
3. Gravitational P.E of a body has____________________?
A. no formula
B. a formula mgh only
C. a formula
D. no general formula
4. When the speed of a moving body is doubled then___________________?
A. its K.E is doubled
B. its acceleration is doubled
C. its P.E is doubled
D. its momentum is doubled
5. One mega watt hour is equal to_________________?
A. 36 x 106 J
B. 36 x 1012 J
C. 36 x 109 J
D. 36 x 108 J
6. Work has the dimension as that of same as that of__________________?
A. torque
B. angular momentum
C. linear momentum
D. power
7. The relation between the escape velocity V esc and orbital speed Vo is given by________________?
A. V esc = 1/2Vo
B. V esc = -2 Vo
C. V esc = Vo
D. V esc = 2Vo
8. When two protons are brought together_____________________?
A. Kinetic energy increases
B. P.E. between them increases
C. P.E. between them decreases
D. P.E. between tem does not change
9. A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ?
A. man does more work than child
B. child does more work than man
C. both do the same amount of work
D. it is a foolish question
10. The area under the force displacement graph represents__________________?
A. area
B. work done
C. power
D. none of these