A) 150 W done clear
B) 750 W done clear
C) 500 W done clear
D) 250 W done clear
View Solution play_arrowA) 12.3 kW done clear
B) 7.0 kW done clear
C) 8.1 kW done clear
D) 10.2 kW done clear
View Solution play_arrowA) 50 m done clear
B) 25 m done clear
C) 12.5 m done clear
D) 10 m. done clear
View Solution play_arrowquestion_answer4) Read the given statements and select the correct option.
Statement 1: If a light body and a heavy body possess the same momentum, the lighter body will possess more kinetic energy. |
Statement 2: The kinetic energy of a body varies as the square of its velocity. |
A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear
B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear
C) Statement 1 is true but statement 2 is false. done clear
D) Both statements 1 and 2 are false. done clear
View Solution play_arrowA) Coolie A done clear
B) Coolie B done clear
C) Both have the same power done clear
D) Cannot say done clear
View Solution play_arrowquestion_answer6) Read the given statements and select the correct option.
Statement 1: A man carrying a bucket of water and walking on a rough level road with a uniform velocity does no work while carrying the bucket. |
Statement 2 : The work done on a body by a force (F) in giving it a displacement (S) is defined as \[W=\overline{F}\cdot \overline{S}=FS\,\,\,\cos \theta \], where \[\theta \] is the angle between vectors \[\overline{F}\] and\[\overline{S}\]. |
A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear
B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear
C) Statement 1 is true but statement 2 is false. done clear
D) Both statements 1 and 2 are false. done clear
View Solution play_arrowquestion_answer7) Match the columns and select the correct option from the codes given below.
Column I | Column II |
(a) Work done by all the forces | (i) Change in potential energy |
(b) Work done by conservative forces | (ii) Change in kinetic energy |
(c) Work done by external forces | (iii) change in mechanical energy |
(d) Work done in uniform velocity | (iv) Zero |
A) (a) - (ii), (b) - (i), (c) - (iii), (d) - (iv) done clear
B) (a) - (i), (b) - (iii), (c) - (iv), (d) - (ii) done clear
C) (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i) done clear
D) (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii) done clear
View Solution play_arrowA) P done clear
B) Q done clear
C) R done clear
D) S done clear
View Solution play_arrowA) \[{{S}_{1}}={{S}_{2}}\] done clear
B) \[{{S}_{1}}>{{S}_{2}}\] done clear
C) \[{{S}_{1}}<{{S}_{2}}\] done clear
D) Cannot say done clear
View Solution play_arrowA) \[{{E}_{1}}\] is greater than \[{{E}_{2}}\] done clear
B) \[{{E}_{1}}\] is less than \[{{E}_{2}}\] done clear
C) \[{{E}_{1}}\] is equal to \[{{E}_{2}}\] done clear
D) Ratio of \[{{E}_{1}}\] and \[{{E}_{2}}\] is equal to ratio of \[{{M}_{1}}\]and \[{{M}_{2}}\] done clear
View Solution play_arrowquestion_answer11) A graph of the total energy of a freely falling body from a height is
A) done clear
B) done clear
C) done clear
D) done clear
View Solution play_arrowquestion_answer12) Read the given statements and select the correct option.
Statement 1: If a rocket explodes in mid air, its kinetic energy increases. |
Statement 2: Chemical energy of the fuel provides additional kinetic energy to the fragments. |
A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear
B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear
C) Statement 1 is true but statement 2 is false. done clear
D) Both statements 1 and 2 are false. done clear
View Solution play_arrow(i) When a body thrown up, its kinetic energy gradually changes into potential energy. |
(ii) When a body falls from a certain height, its potential energy remains the same. |
(iii) If two unequal masses have the same momentum, then the heavier body possesses lesser kinetic energy. |
A)
(i) | (ii) | (iii) |
T | F | T |
B)
(i) | (ii) | (iii) |
F | T | F |
C)
(i) | (ii) | (iii) |
T | T | F |
D)
(i) | (ii) | (iii) |
F | F | T |
(i) The acceleration due to gravity is constant. |
(ii) The potential energy is path dependent. |
A) Only (i) is true. done clear
B) Only (ii) is true. done clear
C) Both (i) and (ii) are false done clear
D) Both (i) and (ii) are true. done clear
View Solution play_arrowA) \[10\text{ m }{{\text{s}}^{-1}}\] done clear
B) \[20\text{ m }{{\text{s}}^{-1}}\] done clear
C) \[30\text{ m }{{\text{s}}^{-1}}\] done clear
D) \[40\text{ m }{{\text{s}}^{-1}}\] done clear
View Solution play_arrowA) \[Mg(\sqrt{2}-1)\] done clear
B) \[Mg(\sqrt{2}+1)\] done clear
C) \[Mg\sqrt{2}\] done clear
D) \[\frac{Mg}{\sqrt{2}}\] done clear
View Solution play_arrowA) In moving from C to D, work done by the force on the body is positive done clear
B) In moving from 6 to C, work done by the force on the body is positive done clear
C) In moving from A to B, the body does work on the system done clear
D) In moving from O to A, work done by the body and is negative. done clear
View Solution play_arrowA) Both the stones reach the bottom at the same time but not with the same speed. done clear
B) Both the stones reach the bottom with the same speed and stone I reaches the bottom earlier than stone II. done clear
C) Both the stones reach the bottom with the same speed and stone II reaches the bottom earlier than stone I. done clear
D) Both the stones reach the bottom at different times and with different speeds. done clear
View Solution play_arrowThe diagram shows a cyclist moving down a small hill at P before travelling on a flat road at Q. The total mass of the cyclist and his bicycle is 60 kg and the speed of the cyclist at P is\[10\text{ m}{{\text{s}}^{-1}}\]. |
Which of the following is incorrect? |
A) The kinetic energy at P is 3000 J. done clear
B) The loss of gravitational energy between P and Q is 1800 J. done clear
C) Total energy is 4800 J. done clear
D) The cyclist does not require a greater power when he travels at a higher constant speed. done clear
View Solution play_arrow(i) It will move with a greater speed at Y. |
(ii) The speed of the object at M is\[10\text{ m}{{\text{s}}^{-1}}\]. |
A) Only (i) is true. done clear
B) Only (ii) is true. done clear
C) Both (i) and (ii) are true. done clear
D) Neither (i) nor (ii) is true. done clear
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