If the vertical component of a vector is equal to its horizontal component, the angle made by the vector with x-axis?

(A) 0∘

(B) 45∘

(C) 90∘

(D) 120∘

A uniform chain of length L and mass M overhangs a horizontal table with its two-third part on the table. The friction coefficient between the table and the chain is μ. The work done by the friction during the period, the chain slips off the table is:

• a) 2/9 μ MgL
• b) 6/7 μ MgL
• c) 1/4 μ MgL
• d) 4/9 μ MgL

A manometer is an instrument used to measure:

• Height
• Pressure
• Liquid Density
• Atmospheric Pressure

A man of mass 60 kg is standing on a boat of mass 140 kg, which is at rest in still water. The man is initially at 20 m from the shore. He starts walking on the boat for 4 s with constant speed 1.5 m/s towards the shore. The final distance of the man from the shore is:

• A.) 15.8 m
• B.) 4.2 m
• C.) 12.6 m
• D.) 14.1 m

Which of the following represents loudness versus intensity of sound graph?

• (A)
• (B)
• (C)
• (D)

The distance between two objects is reduced to half. So, the force of gravitation between the two objects become

• A. Twice of the initial force of gravitation
• B. Four times of the initial force of gravitation
• C. One-fourth of the initial force of gravitation
• D. Half of the initial force of gravitation