451. If the K.E. of a body becomes multiple times of the underlying worth, then the new force will:
A. Become twice its initial value
(B. Become three times, its initial value)
(C. Become four times, its initial value)
(D. Remains constant
452. Linear momentum equals the movement of two bodies with kinetic energy of 4:1. Their mass-to-weight ratio is:
A. 1:2
B. 1:1
C. 4:1
D. 1:4
453. A collection of mass 5 kg is moving with a force of 10 kg/s. For ten seconds, a force of 0.2 N acts on it in the body’s motion direction. Its increased kinetic energy is as follows:
A. 2.8 Joule
B. 3.2 Joule
C. 3.8 Joule
D. 4.4 Joule
454. A power of 10 N uproots an item by 10 m. On the off chance that work done is 50 J, the course of power makes a point with the heading of uprooting.
A. 120 Degree
B. 90 Degree
C. 60 Degree
D. None
455. A man weighing 50 kg ascends 20 steps of 0.25 m in height with a 20 kg load on his head. The climbing work that is done is:
A. 5 J
B. 350 J
C. 100 J
D. 3430 J
456. If the force and particle displacement in the force direction are doubled, work would be:
A. Double
B. 4 Times
C. Half
D. 1/4 times
457. The kinetic energy of a particle is proportional to its momentum. What will be the speed of the molecule?
A. 4 m/s
B. 1 m/s
C. 2 m/s
D. None of these
458. A burglar took a valuable box of weight W and jumped down a height h wall before reaching the ground. He was carrying:
A. 2 W
B. W
C. W/2
D. Zero
459. What is the weight of 700 g of the body on a planet whose mass is 1/7th of that of the earth and radius is 1/2 of the earth?
A. 400 gf
B. 300 gf
C. 700 gf
D. 500 gf
460. The height at which the value of ‘g’ becomes one-fourth to that on earth is:
A. R
B. 2R
C. (3/2)R
D. 4R
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