An elevator cab and its load have a combined mass of 4.3 kg. When the cab, originally moving downward at 9.8 m/s, is brought to rest with constant acceleration in a distance of 4.1 m. The tension (N) in the supporting cable will be: Answer:
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- A warning sign inside an elevator of mans 367 kg indicates that the maximum load that it can carry is 1350 kg Above this, the elevator cable will snap. What is the maximum tension in Newtons along the cable when it is at rest with full capacity?A trinket of mass 0.740 kg is suspended from the ceiling of a truck accelerating horizontally (+x-direction) at 3.40 m/s?. The string that supports the trinket exerts a tension force of 7.68 N and makes an angle with the vertical, as shown. What is the angle 0? {Consider Newton's Laws and the forces/components. Note the angle is with the y-axis} O 19.1° O 30.7° O 45.0° O 24.50 O 36.9° O 70.8° NOO H AL ROAINETwo boxes are connected by a lightweight (mass-less!) cord & are resting on a smooth (frictionless!) table. The masses are mA =10 kg & mB = 3 kg. A horizontal force F = 80 N is applied to mA. Calculate: Acceleration of the boxes. Tension in the cord connecting the boxes.
- A large wrecking ball is held in place by two light steel cables. If the mass m of the wrecking ball is 3620 kg, what are (a) the tension TB in the cable that makes an angle of 40 with the vertical and (b) the tension TA in the horizontal cable?A painter stands on a scaffold hung by its ends from two vertical ropes A and P, 6 m apart. The scaffold weighs 200 N. The tension in A is 750 N and that in Pis 200 N. a) What is the weight of the painter? b) How far from A is he standing?A block of mass 2.63 kg is hung at the midpoint of a string that is attached to the top of a 2-m tall pole at one end and to the top of another 2-m tall pole that is 5 m away at its other end. If due to the weight of the block the string deviates by 6.5º from the horizontal on each side of the block, what is the tension in the string?
- A painter stands on a horizontal uniform scaffold hung by its end from two vertical ropes A and B, 6 m apart. The tension in A is 750 N and that in B is 250 N. Neglecting the weight of the scaffold, (a) What is the weight of the painter? (b) How far from A is he standing?A flexible chain of weight 'w' hangs between two hooks at the same height. At each end, the tangent to the chain makes an angle 0 to the horizontal. (a) What is the magnitude and direction of the force exerted on the hook by the chain at the left? (b) What is the tension in the chain at the lowest point? (Hint: you need to make the force asked for one of the external forces on a body in equilibrium -i.e., look at the equilibrium of half the chain.)Mbeom? 20kg (coble has negligible mass) wall cable Msign 10 leg a) draw Free Buoly diagrom of beom include 3 smpport forces (T, Wx, Wy) d weights %3D 30° beom sign -→ welcome!! b) Find thee tension in the cable (T) c) Find the horizontal ond vertizal components of the force the well exerts on the beam (Wx and Wy)
- I 00LLJ408 - Go.. Question Info and Solutions Blocks A and B of mass 5 kg and 10 kg respectively are placed on a Smooth inclined plane of Inclination 30, as shown. Block A and B are subjected to forces 5 N And 50 N respectively along the incline, as shown. The coefficient of friction between A andBis 0.50 find the frictional force between A and B in N is: (g= 10 ms SOH 300 Options Solution Fs=Static frictional force umg cos 30 (0.5) (5) (10) cos 30 21.6 N Let a be the acceleration of both the blocks along 5.27 PMThe coefficient of static friction µg between the 83-lb body and the 14° wedge is 0.37. Determine the magnitude of the force P required to begin raising the 83-lb body if (a) rollers of negligible friction are present under the wedge, as illustrated, and (b) the rollers are removed and the coefficient of static friction Hs = 0.37 applies at this surface as well. 83 lb 14° Answers: (a) P = i Ib (b) P = i Ib(a) A 2.25 kg salami is supported by a cord that runs to a spring scale, which is supported by another cord from the ceiling (see Figure (a)). What is the reading on the scale, which is marked in weight units? (b) In Figure (b) the salami is supported by a cord that runs around a pulley and to a scale. The opposite end of the scale is attached by a cord to a wall. What is the reading on the scale? (c) In Figure (c) the wall has been replaced with a second 2.25 kg salami on the left, and the assembly is stationary. What is the reading on the scale now? Spring scale Spring scale (b) Spring scale (a) (c) (a) Number Units (b) Number i Units (c) Number Units