Recent content by zerogoal

Homework Statement A steel tank is 6m long, 2m wide and 3.5m high. A viewing glass window is mounted at one side of the tank as shown. The tank contains water to a depth of 3m. The glass window is 0.2m in radius and its top is 0.5m below the water surface. Calculate the magnitude and...

Homework Statement A gate with the shape as shown is mounted on a horizontal shaft. Determine the net moment about the shaft from the hydrostatic forces acting on the gate. Answer: 750kNm Homework Equations h_c: height of centroid = y_c * sin(theta) y_r: location of force or centre of...

hey thanks for taking the time to help me with this question. finally understood.

Hi may i know if the pressure of air in the cylinder is acting upwards or downwards? I know the pressure of the cylinder is acting downwards and the pressure of water is acting upwards. My teacher gave me this equation Pcyclinder= -(Pair + Pwater) However i do not know why Pair is acting in...

Yup got the answer already. Thanks a lot. Appreciate your effort in explaining to me.

so to get x, i just take 420/664=0.63m? or do i use mgx=1/2kx^2 again? (420)(x)=1/2(664)(x^2) x=1.27m? which method should i use to find the distance?

PE=mgh=1/2*k*x^2 =100(9.8)(41)=1/2*k*(11)^2 k=664? Is it like this? Actually i don't understand how to get the PE that have gone into the bungee for the distance of 11m. Do i take the final PE - initial PE?

Homework Statement A bungee cord is 30.0 {\rm m} long and, when stretched a distance x, it exerts a restoring force of magnitude kx. Your father-in-law (mass 100 kg) stands on a platform 45.0 {\rm m} above the ground, and one end of the cord is tied securely to his ankle and the other end to...

Sorry i have made mistakes in my previous reply. I hope I'm not wrong this time wrong. The horizontal forces are centripetal force, friction and centrifugal force. Whereas the vertical force would be the weight and the normal and the vertical friction. To prevent the car from sliding up, there...

The forces that will be present are normal force, friction, weight and centrifugal force. Forces that are parallel to bank's surface would be centrifugal and friction. To calculate the force that prevented the car from sliding, do i use the centrifugal force-static force?

The angle that i got is 16.8degrees After getting the angle, do i take the static force/normal force? Do i take the value of the centrifugal force as my static force? Also when should i use 30m/s?

Homework Statement A curve with a 135 m radius on a level road is banked at the correct angle for a speed of 20m/s. If an automobile rounds this curve at 30m/s, what is the minimum coefficient of static friction between tires and road needed to prevent skidding? Homework Equations...

How long should the length of my Nb be?

Homework Statement A large box containing your new computer sits on the bed of your pickup truck. You are stopped at a red light. The light turns green and you stomp on the gas and the truck accelerates. To your horror, the box starts to slide toward the back of the truck. (Assume that the...

Oh i see. Finally got what you meant. Thanks for clearing my doubts. :wink: Really appreciate your effort in spending time to help me solve this problem. Thanks a lot :smile: