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Learn BANK PO MCQs with answers [Page 1 of Department 107]

M

Mahesh Chandra • 6.28K Points
Tutor III

1) Which conservation principle is applicable in the case of the motion of a rocket?

(A) Conservation of mass
(B) Conservation of charge
(C) Conservation of momentum
(D) Conservation of energy
Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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M

Mahesh Chandra • 6.28K Points
Tutor III

3) A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to

(A) Outward pull on him
(B) Inertia of motion
(C) Change in momentum
(D) Change in acceleration
Correct Answer - Option (B)

No Explanation found. Add Explanation and get +2 points.

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M

Mahesh Chandra • 6.28K Points
Tutor III

4) When a running car stops suddenly, the passengers tends to lean forward because of:

(A) Centrifugal force
(B) Inertia of rest
(C) Inertia of motion
(D) Gravitational force
Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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M

Mahesh Chandra • 6.28K Points
Tutor III

5) A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is 

(A) Greater than the weight of the man
(B) Less than the weight of the man
(C) Same as the weight of the man
(D) Zero
Correct Answer - Option (A)

Explanation :
The weight of the man mg is acting on the floor. As the lift is moving up with an acceleration, say a, the man too in it is having this acceleration. The force producing this acceleration is ma. By Newton's third law, this force will have an equal reaction pressing the floor equal to ma. Therefore the total resultant reaction on the floor is mg+ma = m(g+a) which is mg, the weight of the man. So (a) is correct.

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M

Mahesh Chandra • 6.28K Points
Tutor III

7) It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?

(A) Law of inertia
(B) Newton's second law
(C) Newton's third law
(D) Pascal's law
Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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