(TCO 4) A signal consists of only two sinusoids, one of 65 Hz and one of 95 Hz.

65 Hz, 95 Hz, 150 Hz, 180 Hz, 310 Hz, 340 Hz

Explanation:

Given :

Frequencies of the sinusoids,

,  and

Sampling rate

The positive frequencies at the output of the sampling system are :

When n = 0,

when n  = 1,

When n = 2,

Therefore, the first six positive frequencies present in the replicated spectrum are :

65 Hz, 95 Hz, 150 Hz, 180 Hz, 310 Hz, 340 Hz

Explanation:

Given

mass of block=21 kg

inclination

t=1.51 s

total acceleration