Two blocks are attached by massless strings and accelerated to the right on a frictionless horizontal %3D surface by TB. The masses are m1 = 2.0 kg and m2 = 3.0 kg. The acceleration of the block 1 is 5.0 m/s2. Match the answers with questions. TA TB m1 m2 + What is TA? + What is TB? A. 2.5 N B. 1.0 N С. 25 N D. 10 N Е. 15 N
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- At t = 0, a cart of mass m = 5 kg starts rolling down an incline, making an angle α = 20o with the horizontal. Initially the cart rolls down with no friction, but after traveling a distance of ∆ = 10 m it encounters a rough surface, where the coefficient of friction is k = 0.45. Find the acceleration of the cart along the incline (positive direction is downhill) after it encounters the rough surface. A.9.8 m/s2 B.9.2 m/s2 C.7.7 m/s2 D.3.6 m/s2 E.3.4 m/s2 F.-0.8 m/s2A stack of two crates is being accelerated upwards by two cables. The cables are directly attached to crate 1 and the tension in each cable is 3248 N. You may assume that the masses of the cables are negligible compared to the masses of the crates. The acceleration of the crates is? bottom crate crate 1 is 109 kg. the top crate is 248 kg.Tom travels to the moon for NASA. While on the moon, the total weight of Tom and his lunar exploration suit is 224 N. His suit has a mass of 50 kg. The acceleration due to gravity is 9.81 m/s2 on Earth and 1.67 m/s2 on the moon. What would his weight be on Earth without the heavy suit? 1. 490 N 2. 830 N 3. 987 N 4. 1304 N
- A and Block B are connected by a cable of negligible mass going over a frictionless pulle, of negligible mass. If the coefficient of friction between Block A is 0.2 and Block A has a mass of 2Kg and Block B has a mass of 3Kg ,\\na. What is the downward acceleration of Block B?\\nb. What is the tension in the cable?2. A mass of 2.50 kg is at rest at time = 0. Do not consider friction in this problem. Two vector forces are applied to the mass. What is the resulting vector acceleration? F1 = 2.40 i + 1.50 j Newtons. F2 = 5.00 Newtons at an angle of 25.0°with the positive X axis.In the figure shown, the coefficient of kinetic friction between the block and the incline is 0.40. What is the magnitude of the acceleration of the suspended block as it falls? Disregard any pulley mass or friction in the pulley. p q# 10 p. 242 chap 7 2M ANWALLAFR O 3.4 m/s² O 5.4 m/s² O 3.9 m/s² O 4.2 m/s² O 3.7 m/s² M
- Two blocks connected by a rope of negligible mass are being dragged by a force at a 21° angle above horizontal (see figure below). Suppose F = 117.0 N, m, = 10.0 kg, m, = 26.0 kg, and the coefficient of kinetic friction between each block and the surface is 0.136. Use g=9.8 m/s?. T m2 (b) Determine the acceleration of the system. m/s2 (c) Determine the tension T in the rope. NWhich kid will reach the bottom first if they both leave the slide at the same instant?Martha is pushing a 35 kg chair across the floor. The coefficients of friction between the chair and floor are ? s = 0.70 and ? k = 0.40. a. How hard does she need to push horizontally to just start the chair moving? b. If she applies this same force once it is moving, then what is the resulting acceleration? Draw the free-body diagram for this situation.
- V:r. I ZAY N O O O 1 A A,7IK/s .ll و آذار، ۲۰۲۱ -> o 9:Y. Q1 Block A in the figure below weighs 1.40 N, and block B weighs 4.20 N. The coefficient of kinetic friction between all surfaces is 0.30. Find the magnitude of the horizontal force F necessary to drag block B to the left at a constant speed if A and B are connected by a mass- less cord passing through pulley. A المزيد حذف تعديل مشاركة ...A crate is moving as shown is slowed down by a pushing force P. The force P has a horizontal component of 200 newtons to the left and a vertical component 300 newtons down. The mass of the crate is 90 kgs and the coefficient of kinetic friction is 0.2 and static friction is 0.4. V P What is the magnitude of the acceleration of the crate? Answer in m/s². Use g = 10 m/s². Don't guess! Use the free body diagram method.A horizontal force of 5.0 N pushes a 0.50-kg block against a vertical wall. The block is initially at rest. If µ. – 0.60 and 0.50, the acceleration of the block is: Ⓒ4.8 m/s² Ⓒ3.8 m/s² Ⓒ 9.8 m/s² 0.0 m/s² 08.0 m/s2