571. A parrot flies at a speed of 5 ms-1 in the south, parallel to the railway track, while a train with a length of 150 meters travels in the north. The parrot’s crossing of the train takes the following amount of time:
A. 12 S
B. 8 S
C. 15 S
D. 10 S
572. A person standing in an elevator, which goes up with constant upward acceleration exerts a push on the floor of the elevator whose value:
A. Is always equal to his weight
B. Is always greater than his weight
C. Is always less than his weight
D. Is zero
573. A molecule begins with beginning speed 10 ms-1. In just two seconds, it travels 20 meters in a straight line. What is the particle’s rate of acceleration?
A. 20 ms-2
B. 10 ms-2
C. 1 ms-2
D. Zero
574. In the fourth and fifth seconds of travel, what is the ratio of the distance traveled by a freely falling body from rest?
A. 4 : 5
B. 7 : 9
C. 6 : 5
D. 1 : 1
575. When a person jumps off the ground, the reaction force of the ground is:
A. More than the person’s weight
B. Less than the individual’s weight
C. In proportion to the individual’s weight
D. Zero
576. A body moving in a straight line has a starting velocity of 7 m/s. It has a uniform speed increase of 4 m/s2. The body travels the following distance in the fifth second of its motion:
A. 25 Meter
B. 35 Meter
C. 50 Meter
D. 85 Meter
577. Which of the accompanying four assertions is bogus?
A. A body can have zero speed nevertheless be sped up
B. A body can move at a constant speed while still moving at a different speed
C. A body can have a steady speed nevertheless have a changing speed
D. The bearing of the speed of a body can change when its speed increase is consistent
578. A ball is tossed upwards with a speed of 100 m/s. It will arrive at the ground in:
A. 10 s
B. 20 s
C. 5 s
D. 40 s
579. The electron volt is a unit of?
(A) Mass
B) Energy
(C) Charge
(D) Potential
580. Which one of the following statements correctly describes the abilities of engine A and B to do work. If engine A has a greater power rating than engine B?
A) Engine A can do more work than engine B in the same amount of time.
B) Engine A and B can do the same amount of work in the same amount of time.
C) Engine B can do more work than engine A in the same amount of time.
D) None of the above
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