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A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11 kms−1, the escape velocity from the
1.1 kms−1
11 kms−1
110 kms−1
0.11 kms−1
C.
110 kms−1
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A thin rod of length ‘L’ is lying along the x-axis with its ends at x = 0 and x = L. Its linear density (mass/length) varies with x as,
where n can be zero or any positive number. If the position xCM of the centre of mass of the rod is plotted against ‘n’, which of the following graphs best approximates the dependence of xCM on n?
A.
The dimension of magnetic field in M, L, T and C (Coulomb) is given as
MLT−1C−1
MT2C−2
MT−1C−1
MT−2C−1
C.
MT−1C−1
F = qvB
B = F/qv
= MC−1 T−1
Consider a uniform square plate of side ‘a’ and mass ‘m’. The moment of inertia of this plate about an axis perpendicular to its plane and passing through one of its corners is
(5/6)ma2
(1/12)ma2
(7/12)ma2
(2/3)ma2
D.
(2/3)ma2
A body of mass m = 3.513 kg is moving along the x-axis with a speed of 5.00 ms−1.The magnitude of its momentum is recorded as
17.6 kg ms−1
17.565 kg ms−1
17.56 kg ms−1
17.57 kg ms−1
A.
17.6 kg ms−1
P = mv = 3.513 × 5.00 ≈ 17.6
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