53) When a fast moving vehicle is stopped suddenly the presents the persons sitting in it tend to fall forward. This is due to
(A) inertia of rest
(B) inertia of motion
(C) inertia of direction
(D) all of the above

54) The frequency of a wave is 100 Hz and its wavelength is 50 m. Its velocity is
(A) 150 ms^-1
(B) 50 ms^-1
(C) 2 ms^-1
(D) 5000 ms^-1

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Solution

(53) This is because of inertia, which have ability to oppose the change occurring in its state.

(54) velocity = frequency*wavelength
V=100(50)=5000 m/s

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(53) This is because of inertia, which have ability to oppose the change occurring in its state. (54) velocity = frequency*wavelength V=100(50)=5000 m/s

(53) This is because of inertia, which have ability to oppose the change occurring in its state.

(54) velocity = frequency*wavelength
V=100(50)=5000 m/s