# A person standing on a moving elevator feels 20% heavier than when at rest. The elevator is accelerating upward at

1.  2m/sec2

2.  12m/sec2

3.  4m/sec2

4.  6m/sec2

4

2m/sec2

Explanation :
No Explanation available for this question

# Two metallic blocks having masses in the ratio 2:3 are made to slide down a friction less inclined plane starting initially from rest position. When these blocks reach the bottom of the inclined plane, they will have their kinetic energies in the ratio

1.  2:3

2.  3:5

3.  3:2

4.  7:4

4

2:3

Explanation :
No Explanation available for this question

# AB is the vertical diameter of a circle in a vertical plane. Another diameter CD makes an angle of 600 with AB. Then the ratio of time taken by a particle to slide along AB to the time taken by it to slide along CD is

1.  1:√3

2.  √2:1

3.  1:√2

4.  √3:√2

4

1:√2

Explanation :
No Explanation available for this question

# The displacement time graph for two particles A and B are straight lines inclined at angles of 300 and 450 with then time axis. The ratio of velocities Va:Vb will be

1.  0.33

2.  0.52

3.  0.577

4.  0.877

4

0.577

Explanation :
No Explanation available for this question

# The velocity time graph of a body is a straight line passing through the origin>If the slope of the graph is m, the distance travelled by the body in time t would be

1.  2mu2

2.  mu2/2t

3.  u2/2m

4.  none of these

4

u2/2m

Explanation :
No Explanation available for this question

# Which of the following graphs represents the motion of an objects moving with a linearly increasing acceleration against time

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# In the figure, disks A ad B rotates with the angular velocity and weight the same. If the ratio of the radio of A and B is 2:1, then the ratio of their kinetic energies is

1.  1:2

2.  2:1

3.  1:1

4.  4:1

4

4:1

Explanation :
No Explanation available for this question

# Two balls of mass 2 kg and 4 kg respectively are connected to the two ends of a spring. The balls are presented together and placed on a smooth table. When released, the lighter ball moves with an acceleration of 2m/s2.The acceleration of the heavier ball will be

1.  0.5 m/sec2

2.  1 m/sec2

3.  2 m/sec2

4.  3 m/sec2

4

1 m/sec2

Explanation :
No Explanation available for this question

# Two particles with masses in the ratio 1:4 are moving with equal kinetic energy. The magnitude of their linear momentum will conform to the ratio

1.  1:8

2.  1:2

3.  √2:1

4.  √2

4

1:2

Explanation :
No Explanation available for this question

# If two bodies one light and other heavy have equal kinetic energies, which one has a greater momentum

1.  heavy body

2.  light body

3.  both have equal momentum

4.  it depends on the actual velocities

4

light body

Explanation :
No Explanation available for this question

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