QUESTION 6 (a) The bar shown in Figure Q2(a) is subjected to tensile load of 150 Kn. If the stress in the middle portions is limited to 160 N/mm², determine the diameter of the middle portion. Find also the length of the middle portion if the total elongation of the bar is to be 0.25 mm. E E = 2.0 + 105N/mm². (12 marks) 150 KN 10 cm DIA 10 cm DIA 150 KN 45 cm Figure Q6(a) (b) A brass bar, having cross-section area of 900 mm², is subjected to axial forces as shown in Figure Q2(b), in which AB = 0.6 m, BC = 0.8 m, and CD = 1.0 m. Find the total elongation of the bar. E = 1.0 + 105N/mm2 . (8 marks) Page 4 of 5 B D 40 KN 70 KN 20 KN 10 KN Figure Q6(b) (TOTAL = 20 MARKS)

Link will be apear in 30 seconds.

Well done! you have successfully gained access to Decrypted Link.

 1 . This 4-bit Up Down counter has five input signals and one output signal. Rst_a is asynchronous reset signal. clk is clock signal. Load is used to load counter with predefined input value. Up_down is for counting up or counting down operation. Enable is to enable output signal. Op is four bits wide output signal that will give counted value.

Verilog Code for  4-bit up/down counter is:

module upordown_counter(
    Clk,
    reset,
    UpOrDown, 
    Count
    );

    input Clk,reset,UpOrDown;
    output [3 : 0] Count;
    reg [3 : 0] Count = 0;     
     always @(posedge(Clk) or posedge(reset))
     begin
        if(reset == 1) 
            Count <= 0;
        else    
            if(UpOrDown == 1)  
                if(Count == 15)
                    Count <= 0;
                else
                    Count <= Count + 1; 
            else  
                if(Count == 0)
                    Count <= 15;
                else
                    Count <= Count - 1;
     end    
endmodule

Testbench for counter:

module tb_counter;
reg Clk;
reg reset;
reg UpOrDown;
wire [3:0] Count;

upordown_counter uut (
.Clk(Clk),
.reset(reset),
.UpOrDown(UpOrDown),
.Count(Count)
);

initial Clk = 0;
always #5 Clk = ~Clk;

initial begin

reset = 0;
UpOrDown = 0;
#300;
UpOrDown = 1;
#300;
reset = 1;
UpOrDown = 0;
#100;
reset = 0;
end
endmodule

Waveform from simulation is: