6. Exercise 2.5.32 Block A is observed to be dropping down at a steady 0.9 ft/s. At what velocity must the free end of the pulley be moving?
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- 3. A block slides up a smooth (nearly frictionless) surface inclined at 12 above the horizontal. At t-0, we notice the speed is 4.1m/s. 12° a. Compute the acceleration of the block, making your force analysis clear in the picture. b. Compute the distance the block will slide up the ramp before turning around (relative to the position at t-0).An arborist is cutting down a tree a 28 m high tree bystarting his cut 1.8 m above the ground. The tree has a mass of 3750 kg. The tree trunk can be thought of as a uniformly dense, thin rod. 1. What's the speed of the tree’s center of mass when the trunk is parallel to the ground on its way down. The tree rotates about the point where it is cut., 1.8 m above the ground. 2. What is the total amount of kinetic energy that the tree has at thatpoint of parallelism to the ground? How fast would a 950.0 kg truck have to be traveling to have the same kinetic energy as the tree?A steel ball was released from rest into a cylinder full of water. the downward acceleration up the ball is defined by the equation a=0.9g-CV. whose g is accelerating due to gravity. C=3.02/s. Det. the velocity in m/s after 0.25mins. a) Det. the dept of the ball from the water surface after 0.25 mins. b.) when of the following most nearly gives the acceleration of the ball when it reaches the bottom if the total height of the cylinder is 50 ft?
- block C mass = 99 kg block D mass = 66kg horizontal force (H) = 555N and is applied at block D. Angle = 32.779 degrees note: Ignore friction. Computations must follow D'Alembert's Principle or else the solution is null and void. And answers should be in Newtons or KiloNewtons 1.) Calculate the Normal Force of Contact between blocks D and C. 2.) Determine the Block D Acceleration 3.) Determine the Block C AccelerationA dinghy is pulled toward a dock by a rope from the bow through a ring on the dock 4 m above the bow. The rope is hauled in at the rate of 0.8 m/s. Complete parts a. and b. a. How fast is the boat approaching the dock when 5 m of rope are out? The distance between the boat and the dock is changing at a rate of (Type an integer or a simplified fraction.) b. At what rate is the angle 0 changing at this instant? (Type an integer or a simplified fraction.) rad/s.The two blocks started at rest. The surface of the inclined plane is frictionless. (note: neglect mass and friction of the pulley) Given: Weight of A=230 lb. Weight of B=300 Ib. Calculate: a) acceleration of A (ft/s"), 30° with the horizontal b) Acceleration of B (ft/s"), downward c) the tension in the cable (Ib.) B 30°
- Please help. This problem involves angular acceleration and linear acceleration of a bar. Thank you.6.8. A driver sees a horse on the road and applies the brakes so hard that they lock and the car skids to a stop in 24 m. The road is level, and the coefficient of kinetic friction between tires and road is 0.7. How fast was the car going when the brakes were applied?3) Prof. K. likes snowboarding at Mt. Rose and always tries to be the first one on the mountain on powder days. The sharpest corner on Mt. Rose Highway has a radius of 105 ft and the coefficient of friction between rubber tires and the snowy road is 0.4. The weight of Prof. K., her car, and her snowboard equipment is 3,800 lb. If she drives at a constant speed, determine how fast she can safely go around the turn (in mph) without losing traction. [Ans. to check: 25.1 mph] K 9:03 AM O 30°F Sunny 2/16/2022 P Type here to search Del PrtScn Home F9 End F10 PgDn 12 DII Esc F4 F6 F7 Barkspac
- A Center Raft A person is standing at one end of a uniform raft of length L that is floating motionless on water, as shown above. The center of mass of the person-raft system is a distance d'from the center of the raft. The person then walks to the other end of the raft. If friction between the raft and the water is negligible, how far does the raft nove relative to the water? L/2 B L C d/2 Ⓡ O d Center of Mass of System 2d in1. A car travelling at 50kph can be stopped at a distance of 40m by applying brakes. If the same car is travelling at 80kph, the minimum stopping distance in meters is (assume no skidding).Page 4 of 4 Next Page Previous Page VSaved Question 14 (4 points) AListen Q4. A block is connected to a spring of length s that is initially unstretched. Then the block is given an initial speed vo, and a constant force Fis also applied on it, and it slides down the smooth (friction-less) inclined surface. (Both the velocity and the force have directions along the inclined surface.) The block will eventually stop due to the spring force. (1) On paper, sketch the FBD for the block after the force is applied on it. In the answer area below, simply enter: "see notes." 0000 vo F 30°