Homework Statement
In a floor there is a heavy duty uniform trap door that is hinged at one side the door has a mass if M = 25 kg a length from hinge to edge of L = 1.0 m, and rotational moment of inertia I = (ML^2)/3= 8.33 kg*m^2.
Question 1:
What upward Force must be applied to handle at...
Homework Statement
Three identical rods are welded together to form a Y-shaped figure. The cross-sectional area of each rod is A, and they have length L and thermal conductivity k.
View Figure
The free end of rod 1 is maintained at T_1 and the free ends of rods 2 and 3 are maintained at a...
Homework Statement
assuming that the temperature inside is T_in = 20 C and the temperature outside is T_out = 0 C. The walls and uppermost ceiling of a typical house are supported by 2*6-inch wooden beams (k_wood = 0.12 W/m /K) with fiberglass insulation (k_ins = 0.04 W/m /K) in between. The...
A ball of mass m moving with velocity v_i_vec strikes a vertical wall. View Figure The angle between the ball's initial velocity vector and the wall is theta_i as shown on the diagram, which depicts the situation as seen from above. The duration of the collision between the ball and the wall...
A girl of mass m_1 = 60 kilograms springs from a trampoline with an initial upward velocity of v_i = 8.0 meters per second. At height h = 2.0 meters above the trampoline, the girl grabs a box of mass m_2 = 15 kilograms. View Figure
For this problem, use g = 9.8 meters per second per second...
Two cars, both of mass m, collide and stick together. Prior to the collision, one car had been traveling north at speed 2v, while the second was traveling at speed v at an angle phi south of east (as indicated in the figure). After the collision, the two-car system travels at speed v_final at an...
A mortar fires a shell of mass m at speed v0. The shell explodes at the top of its trajectory (shown by a star in the figure) as designed. However, rather than creating a shower of colored flares, it breaks into just two pieces, a smaller piece of mass 1/5 m and a larger piece of mass 4/5 m...