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- If the rocket sled starts with only onw rocket burning, what is the magnitute of its acceleration. Assume that the mass of the system is 2.50x10^3 kg, the thrust F=2.10x10^4N and the force of friction opposing the motion is known to be f=665N. a. What is the magnitude of its acceleration?A rocket with a mass of 1 ton is launched vertically. Its initial speed at T = 0 is 1200 km/h, its friction with the air is 200N. Find. a) Differential equation in terms of b, m and g. b) The solution of the differential equation for V. c) The value of the velocity with t= 1 min, 2 min.moodle.nct.eduom/mod/qi -Learning Portal Courses - Reports - e-Services- Academic Departments - ETC - CIMS - A 17kg crate resting on a horizontal surface is pushed as shown. If the coefficient of static friction u, between the surfaces is 0.24, what is the minimum force (F) required to start the motion? O a 4.08N O b. 70.83N Oc 39.98N Od. 694.17N Windows buut An object of mass Skg is sliding with a constant velocity of 10m/s on a frcitionless horizontal table. The force needed to keep the object moving with the same velocity is. 144 4- # 4. 6. V.
- A rocket sled decelerates at a rate of a =197 m/s^2. Its passenger has a mass of 73.5 kg. a. Calculate the horizontal component of the force the seat exerts against his body. b. Compare his weight by using a ratio. The horizontal component of the forice is how many times his weight. Calculate the magniture and direction of the total force the seat exerts against his body.A block of mass ?=2.80 kg is being pulled by a force ?⃗of magnitude 12.0 N on a horizontal, smooth (frictionless) surface. The force makes an angle ?=30.0° abovethe horizontal, as shown in the figure. 1. Find the magnitude of the normal force exerted by the surface on block. 2. Find the acceleration of the box. 3. If the box starts from rest, what would be its speed after it travels 2.00 m?100. mmh The speed of a bobsled is increasing because it has an accel- eration of 2.4 m/s². At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 450 N. The combined mass of the bobsled and its riders is 270 kg. (a) What is the magnitude of the force propelling the bobsled forward? (b) What is the magnitude of the net force that acts on the bobsled?
- 32. A 3.00-kg object is moving in a plane, with its x and y W coordinates given by x52-1 and3 2, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at -2.00sConsider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state of motion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state ofmotion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.
- A 100. N block sits on a rough horizontal floor. The coefficient of sliding friction between the block and the floor is 0.250. A horizontal force of 90.0 N acts on the block for 3.00 seconds. Calculate the velocity of the block after 3.00 seconds if it starts from rest.A push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle 0 below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. The normal force on the box due to the floor is equal to: O W + P cos 0. O W + P sin 0. OW-P sin 0. O W + P. O W. W 0 PKinetic Coeff. Friction = 0.26 Mass ml = 26.6 kg Mass m2 = 66 kg Mass m3 = 271 kg Find the acceleration of mass m3 in m/s?. Mz M3 Select one: O a. 50.7941 downward Ob. 31.1741 downward Oc. 6.1310 downward Od. -12.4957 downward