Q- (a) Draw the free-body diagram of the link at B.
(b) If the spring has a stiffness of k=800 N/m and an unstretched length of 100 mm, determine the tension in cables BC and BD when the spring is held in the position shown.
.
Rotational Motion
Q- A solid wheel of mass 30 kg is rolled toward the left along a horizontal surface under the action of a horizontal force of magnitude 200 N, acting at the center of the wheel . If the friction is sufficient to prevent slipping, what is the magnitude of linear acceleration of the center of the whee…
Collision
Q- A truck with mass 5000 kg is heading east at 20 m/s. Meanwhile a car with mass 2500 kg is heading north at 30 m/s. The two vehicles collide at an intersection, get stuck together and the wreckage keeps moving to some direction.
(a) Is the collision elastic or inelastic?
(b) Find the speed of th…
Thermodynamics
Q- A well-insulated rigid cylinder is divided in to 2 compartments by a conducting piston that is free to move freely. Initially one side of the piston contains 1 m3 of O2 at 5 bar, 800C and the other side contains 1m3 of N2 at 7 bar, 200C. The piston is released and the system is allowed to come …
Electrostatics: Coulomb's Law
Q- Two equally charged point mass of mass m each are suspended from a point by massless threads of length L. In equilibrium position each thread makes and angle ɵ with vertical.
(a) Find the ratio of magnitudes of horizontal electric force and vertical gravitational force on a the masses.
(b) Wh…
Rotation: Sphere over Sphere
Q- A solid sphere of radius R starts at rest on top of a semicircular track of radius S., as shown in the figure. The sphere rolls without slipping along the track until it falls off the track at point B. Point A is a vertical distance H above the ground; the height of point B is unknown. You may as…
Work Done by Variable Force
Q- The force verses displacement graph for a variable force acting on a particle during some displacement is given bellow (the thick lines)
(a) Calculate the total work done by this force on the particle.
(b) Which well-known physical device could produce the type of force during the first 10 seco…
Standing Waves
Q- One of the 63.5 cm long strings of an ordinary guitar is tuned to produce the not B (frequency 245 Hz) when vibrating in its fundamental mode.
(a) find the speed of the transverse wave on this string.
(b) If the tension in the string is doubled, what will be the new fundamental frequency of the…
20 .
« Newer | Older »
Comments