A 0.200 kg bead slides on a curved wire, starting from rest at point A in Figure P5.28. If the wire is frictionless, find each of the following. Figure P5.28 (a) the speed of the bead at B m/s
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A 0.200 kg bead slides on a curved wire, starting from rest at point A in Figure P5.28. If the wire is frictionless, find each of the following.
Figure P5.28
(a) the speed of the bead at B
m/s
(b) the speed at C
m/s
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- 2. In the accompanying figure, a tiny cube is pushed and released at point A. It has an initial velocity of 7.23 m/s. The whole course is frictionless except that marked L which is 16.2 m and has a coefficient of kinetic friction of µk = 0.78. Heights hi = 6.00 m and h2 = 2.00 m. (a) What is the speed of the cube at point B? (Hint: you do NOT need its mass) (b) What is the speed of the cube at point C? (c) Does the cube make it to point D? If so, how fast is it going there? If not, what is its distance traveled through region L?A crate with mass m = 33.3 kg being pushed up an incline that makes an angle φ = 22.7 degrees with horizontal. The pushing force is horizontal, with magnitude P, and the coefficient of kinetic friction between the crate and the incline is μ = 0.358. Consider the work done on the crate as it moves a distance d = 5.32 m at constant speed. a. What is work done by the pushing force, in joules? b. What is the work done by friction, in joules? c. What is the work done by gravity, in joules? d. What is the net work, in joules?A 1943 kg rollercoaster is released from an initial height of 52 m above the ground and will eventually reach Point Awhich is 16 m above the ground, and Point Bwhich is 35 m above the ground. How fast is the car moving at Point A? Note: There is no friction on this track?
- 14. In the figure, a 4.0 kg block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is vo = 6.0 m/s, the height difference is h = 1.2 m, and uk = 0.40. (1) Find the speed of the block when it just reaches the higher level (2) Find the distance d. μ = 0 -μ*HW 5 3. A playground slide is in the form of an arc of a circle with a maximum height of 2.5 m, with a radius of 8.8 m, and with the ground tangent to the circle. Dr. Ritchey's 16 kg toddler starts from rest at the top of the slide and has a speed of 3.4 m/s at the bottom. a. What is the length of the slide? b. What average frictional force acts on the toddler over this distance? 2.5 m 2022-0 O puck position1.xlsx 2022-02-23 17-36...pdf 22-02-27 22-32.pdf Lab4.pdfMaria sets up a simple track for her toy block (m = 0.30 kg) as shown in the figure below. She holds the block at the top of the track, 0.54 m above the bottom, and releases it from rest. (a) Neglecting friction, what is the speed of the block when it reaches the bottom of the curve (the beginning of the horizontal section of track)? m/s(b) If friction is present on the horizontal section of track and the block comes to a stop after traveling 0.80 m along the bottom, what is the magnitude of the friction force acting on the block? N
- A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is launched from a height h/5 into the pool. (a) Is mechanical energy conserved? Why? (b) Give the gravitational potential energy associated with the child and her kinetic energy in terms of mgh at the following positions: the top of the waterslide, the launching point, and the point where she lands inthe pool. (c) Determine her initial speed V0 at the launch point in terms of g and h. (d) Determine her maximum airborne height ymaxin terms of h, g, and the horizontal speed at that height, v0x. (e) Use the x-component of the answer to part (c) to eliminate from theanswer to part (d), giving the height ymax in terms of g, h, and the launch angle θ. (f) Would your answers be the same if the waterslide were not frictionless? Explain.Draw a diagram of a 50 kg box sliding down a 6 meter high plane angled 30o to the horizontal. If the coefficient of friction force between the box and the plane is 0.4, what is the speed of the box at the end of the plane?During a rockslide, a 390 kg rock slides from rest down a hillside that is 460 m long and 300 m high. The coefficient of kinetic friction between the rock and the hill surface is 0.24. If the gravitational potential energy U of the rock-Earth system is set to zero at the bottom of the hill, what is the value of U just before the slide?1.15×106 J How much mechanical energy is dissipated by frictional forces during the slide? What is its speed then? What is the kinetic energy of the rock as it reaches the bottom of the hill?
- 14. A block is sent sliding down a frictionless ramp. Its speeds at points A and B are 2.00 m/s and 2.60 m/s, respectively. Point A is higher up the ramp than point B. Next, it is again sent sliding down the ramp, but this time its speed at point A is 4.00 m/s. What then is its speed at point B? (a) 2.5 m/s (b) 4.3 m/s (c) 5.4 m/s (d) 6.1 m/sA small sphere of mass m is launched horizontally over a body of water from a height h above the water and with a launch speed v0. Determine expressions for the following in terms of m, v0, h, and g. Air resistance is negligibly small. W is the amount of work done by the force of gravity on the projectile during its flight. ΔKE is the change in kinetic energy ΔKE of the projectile from the time it was fired until it hits the water. KEf is the final kinetic energy KEf of the projectile as it hits the water.Please don't provide handwritten solution.....