Considering equilibrium condition of beam
RA+RB=380*9.81
RA+RB=3727.8N
Take moment about point B
RA(3.3)=380*9.81*1.2
RA=1355.54N
RB=2372.23N
A 1.8 kg block with an initial velocity of 1.2 m/s slides to a stop in 2.1 m. A) What is the acceleration due to friction? B) What is the kinetic frictional coefficient?
Part A A 14 kg projectile is launched at 380 m/s at a 55 angle to the horizontal. At the peak of its trajectory it collides with a second projectile moving horizontally, in the opposite direction, at 140 m/s The two stick together and land 9.9 km horizontally downrange from the first projectile's launch point Find the mass of the second projectile. Express your answer using two significant figures. m-9.3 kg Submit Previous Answers Request Answer X Incorrect: Try Again;...
3. An 4.0-kg object moving 2.1 m/s in the positive x direction has a one-dimensional collision with a 2.0-kg object moving 3.2 m/s in the opposite direction. Assuming the collision is frictionless. The final velocity of the 2.0-kg object is 2.1 m/s in the positive x direction. What is the final velocity of the 4.0 kg object? (0pts)
A 4.8-μC point charge is located at x = 1.2 m, y = 2.9 m, and a-3.9-pC point charge is located at x 2.1 m, y :-1.9 m. (a) Find the magnitude and direction of the electric field at x magnitude direction 233 -2.7 m, y 1.2 m (b) Find the magnitude and direction of the force on a proton at x- -2.7 m, y 1.2 m magnitude direction 233
m1 m2 V1 v2 Ptotal V2 1.8 m/s 1.2 kg 1.2 kg +1.5 m/s 1.8 m/s 2.4 kg 4.8 kg +1.3 m/s 0m/s 2.5 kg 3.9 kg 5.1 kg 1 kg 0.9 m/s 4.6 m/s -0.433 m/s 0.85 m/s 11.5 2.75 m/s kg m/s 4.6 m/s Table 1
007 10.0 points A bridge of length 76 m and mass 1.2 x 10 kg is supported at each end. A truck of mass 28600 kg is located 50 m from the left end. K 50 m - — 76 m What is the force on the bridge at the left point of support? The acceleration of gravity is 9.8 m/s2. Answer in units of N. 08 10 neinta
A beam of electrons (m - 9.11 * 10-31 kg/electron) has an average speed of 2.1 x 10 m/s. What is the wavelength of electrons having this average speed, in picometers? pm Submit Show Approach Show Tutor Steps
ne particle has a mass of 3.44 x 10-3 kg and a charge of +7.61 μC. A second particle has a mass of 8.14 x 10-3 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between them is 0.127 m, the speed of the 3.44 x 10-3 kg-particle is 119 m/s. Find the initial separation between the particles.
Approximately 2.1 x 105 kg of water falls 14 m over a waterfall each second. (a) What is the decrease in the gravitational potential energy of the water-Earth system each second? (b) If all this energy could be converted to electrical energy (it cannot be), at what rate would electrical energy be supplied? (The mass of 1 m3 of water is 1000 kg.) (c) If the electrical energy were sold at 1.7 cent/kW·h, what would be the yearly income in...
A block of mass m = 2.1 kg is attached to a single spring of spring constant k = 4.3 and allowed to oscillate on a horizontal, frictionless surface while restricted to move in the x-direction. The equilibrium position of the block is x = 0m. At time t = 0s the mass is at position x =-0.7m and moving with x-component of velocity vx-1.79. what is the x- component of velocity at time t = 5.3s? Answer in meters...