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Question: 3940 4648 please answer the questions in less an hour...

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39,40, 46,48 please answer the questions in less an hour
In the following truss, all members are of equal length. The force in link BF is most nearly E 1200 N O(A) 400 N O(B) 500 N O (C) 600 N (D) 700 N
10 m/s 20 m/s The two masses shown are heading toward each other. If the coefficient of restitution is 0.8, the velocity of mass B after the collision is most nearly O (A) 7.0 m/ls O (B) 11 m/s O (C) 13 m/s O (D) 16 m/s
Which of the following expressions does NOT correctly describe rectilinear motion with constant acceleration? (A) v=vo + aot ○ (B) o (C) 2a0 ○(D)
A motor weighing 50 kg is supported by four springs, each with a spring constant of 2000 N/m. The motor can only move in the vertical direction. The speed at which resonance will occur is O (A) 6 radis O (B) 13 rad/s O (C) 40 rad/s O (D) 160 rad/s
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