1. A 700g ball rotates around a vertical shaft supported by two…

Question Answered step-by-step 1. A 700g ball rotates around a vertical shaft supported by two… 1. A 700g ball rotates around a vertical shaft supported by two strings, as shown in Figure A2.01. If the tension in the upper string is 20.0N, determinethe tension in the lower string.the rotation rate (in rpm) of the system.2. Earth is a spherical body, of radius 6,376km, which completes a full rotation about its axis in 24h. How long (in hours) should the day on Earth be so that a person at the equator is able to float freely above the ground? 3. Three lead spheres, of mass 10kg each, are located at three corners of a square of side length 45cm, as shown in Figure A2.03. A bead is released at the forth corner. By considering the gravitational forces among the four objects only, determine the magnitude and direction of the acceleration of the bead when released.Image transcription text- – – –: – – – – – – 45 cm 10 kg FigureA2.03… Show more4. A spy satellite completes six revolutions every day in a circular orbit. Determinethe altitude of the satellite above Earth’s surface.the speed of the satellite. 5. A hand gun fires a 7.50g bullet at a speed of 377m/s.Calculate the bullet’s kinetic energy.At what speed (in km/h) must a motorcycle of mass 170kg move to have the same kinetic energy?6. A dinner plate, of mass 580g is pushed 90cm along a dining table by a constant force of F=3.6N directed at ?=24? below the horizontal, as shown in Figure A2.06. If the coefficient of kinetic friction between the plate and the table’s surface is 0.44, determinethe normal force exerted on the plate by the table.the work done by the applied force F.the work done by the force of kinetic friction.7. A box slides on a smooth (frictionless) horizontal surface, 1.5m above the floor, at a speed of 2.0m/s, as shown in Figure A2.07. The box then slides down a ramp that makes an angle of 36? with the horizontal and has a coefficient of kinetic friction equal to 0.43. After reaching the end of the ramp, the box continues to slide horizontally on the smooth floor. Use the law of conservation of energy to calculate the final speed (v) of the box.8. A block of mass 3.0kg is pressed against a spring (k=3,100N/m) near the bottom of a board inclined at ?=28?, as shown in Figure A2.08. When released, the block is projected up the incline and the spring expands by 14cm to its normal length. Using the law of conservation of energy, determine the maximum distance (d) traveled by the block up the incline,in the absence of friction.when the coefficient of kinetic friction between the block and the board is 0.20.9. A 14,000kg tractor traveling north at 21km/h turns west and travels at 26km/h. Calculate the change in the tractor’skinetic energy.linear momentum (magnitude and direction).10. A firecracker travels straight up at 75.0m/s and explodes into two pieces. The smaller piece carries one third of the firecracker’s mass and shoots off horizontally at 48.0m/s west. Determine the speed and direction of the other piece directly after the explosion. 11. Three blocks slide on a smooth surface, as shown in Figure A2.11. Initially, the first block (m1=1.0kg) moves at 3.0m/s to the right, the second block (m2=2.0kg) is at rest, and the third block (m3=3.0kg) moves to the left at 0.50m/s. First, m1 collides elastically with m2 and recoils to the left. Afterwards, m2 and m3 collide and stick. Calculate,the velocities of m1 and m2 after the first collision.the velocity of m2 and m3 after the second collision.12. A billiard ball moves at a speed of 4.00m/s and collides elastically with an identical stationary ball. As a result, the stationary ball flies away at a speed of 1.69m/s, as shown in Figure A2.12. Determinethe final speed and direction of the incoming ball after the collision.the direction of the stationary ball after the collision.13. A glass of water (height 15cm and diameter 7.0cm) sits on a dining table, as shown in Figure A2.13. The coefficient of static friction between the glass and the table’s surface is 0.35. Determine the maximum height (h) above the tabletop at which you can push horizontally, with your fingertip, and cause the glass to slide without tipping.Image transcription text7 cm F 15 cm h FigureA2.13… Show more14. A 160-kg utility pole extends 12.0m above the ground. A horizontal force of 250N acts at its top and the pole is held in the vertical position by a cable, as shown in Figure A2.14.Draw a free-body (or force) diagram for the pole.Determine the tension in the cable.What are the reaction forces exerted at the lower end of the pole by the ground?15. A 40.0-kg uniform platform is suspended by two cables, 2.00m apart, where the centre of the platform lies midway between the cables. A 5.00-kg paint bucket is placed on the platform, 24.0cm to the right of the right cable, as shown in Figure A2.15. Determine the tension in each cable.Image transcription text2.0 m 24 cm FigureA2.15… Show more16. A square plate has a side length of 1.20m. A 24.0-N?m torque is applied about an axis perpendicular to the plate through its centre. If it experiences an angular acceleration of 6.25rad/s2, calculate the mass of the plate. 17. A light string is wrapped around a solid cylinder, and a block of mass m=100g hangs from the free end of the string, as shown Figure A2.17. When released, the block falls a distance of 1.0m in 2.0s.Draw free-body (or force) diagrams for the block and the cylinder.Calculate the tension in the string.Determine the mass (M) of the cylinder.Image transcription textO M m Figure A2.17… Show more18. A thin uniform rod (of mass 10kg and length of 1.2m) is attached to a friction-free pivot. Initially, the rod is balanced vertically above the pivot (position A in Figure A2.18). If the rod falls from rest, calculatethe angular acceleration at position B.the angular velocity at position C.  Science Physics PHYSICS 200 Share QuestionEmailCopy link Comments (0)

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