Concept explainers
In the hammer throw, an athlete spins a heavy mass in a circle at the end of a cable before releasing it for distance. For male athletes, the “hammer” is a mass of 7.3 kg at the end of a 1.2 m cable, which is typically a 3.0-mm-diameter steel cable. A world-class thrower can get the hammer up to a speed of 29 m/s. If an athlete swings the mass in a horizontal circle centered on the handle he uses to hold the cable
a. What is the tension in the cable?
b. How much does the cable stretch?
Trending nowThis is a popular solution!
Chapter 8 Solutions
College Physics: A Strategic Approach, Books a la Carte Edition (4th Edition)
Additional Science Textbook Solutions
Conceptual Integrated Science
College Physics
Essential University Physics: Volume 1 (3rd Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
College Physics (10th Edition)
- A small box with a mass of 6.61 kgkg is being swung around on the end of a string which has a length, L=L=1.52 mm . The box has a tangential velocity of 3.20 m/sm/s and is moving on a level, horizontal surface which has a co-efficient of kinetic friction of 0.345 and a co-efficient of static friction of 0.397.arrow_forwardWhat is the ideal banking angle of a road having a Porsche car running through it with an angular velocity of 20 rad/sec and the circular radius of the road is 20 meters? A. 19.93° B. 99.93° C. 29.81° D. 89.93°arrow_forwardA child’s toy consists of a small wedge that has an acute angle of 34◦. The sloping side of the wedge is frictionless, and the wedge is spun at a constant speed by rotating a rod that is firmly attached to it at one end. When the mass of 41 g rises up the wedge a distance 46 cm and stays there, what is the speed of the mass? The acceleration of gravity is 9.8 m/s2 .arrow_forward
- Find the required angular speed of an ultracentrifuge for the radial acceleration of a point 2.70 cm from the axis to equal 3.00 x 10^5 garrow_forwardA child is sitting 1.50 m from the center of a wooden, circular, rotating disk. The coefficient of static friction between the child and disk is 0.30. What is the maximum speed the child can have before slipping off the disk?arrow_forwardYou have a cylinder. You don't know what its internal structure looks like, but you plan to roll it down a ramp, as in this week's procedure. The ramp is 1 m long, and is elevated at an angle of 15°. The mass of the cylinder is 450 g and its diameter is 2.1 cm.After you release the cylinder, it rolls down the ramp without slipping, gaining speed. How much total energy (in J)does the block have at the bottom of the ramp?arrow_forward
- A 750 g disk and a 760 g ring, both 15 cm in diameter, are rolling along a horizontal surface at 1.3 m/s when they encounter a 13 ∘ slope. How far up the slope does the disk travel before rolling back down? How far up the slope does the ring travel before rolling back down?arrow_forwardA 1.5 kg block and a 2.7 kg block are attached to opposite ends of a light rope. The rope hangs over a solid, frictionless pulley that is 29cm in diameter and has a mass of 0.78kg. The pulley can be modeled as a cylinder. When the blocks are released, what is the acceleration of the lighter block?arrow_forwardIn a popular amusement park ride, a rotating cylinder of radius 3.00 m is set in rotation at an angular speed of 5.00 rad/s, as in Figure P7.75. The floor then drops away, leaving the riders suspended against the wall in a vertical position. What minimum coefficient of friction between a rider’s clothing and the wall is needed to keep the rider from slipping? Hint: Recall that the magnitude of the maximum force of static friction is equal to μsn, where n is the normal force—in this case, the force causing the centripetal acceleration.arrow_forward
- In the hammer throw, an athlete spins a heavy mass in a circle at the end of a cable before releasing it for distance as shown in (Figure 1). For male athletes, the "hammer" is a mass of 7.3 kg at the end of a 1.2 m cable, which is typically a 3.0-mm-diameter steel cable. A world-class thrower can get the hammer up to a speed of 29 m/s. If an athlete swings the mass in a horizontal circle centered on the handle he uses to hold the cable. (a) What is the tension in the cable? Neglect the gravity. (b) How much does the cable stretch? Young modulus for steel is 20×1010N/m220×1010N/m2.arrow_forwardWhat is the angular speed of Mercury's center of mass as it orbits the Sun? (Use 88 as the number of Earth days required for the planet to complete one revolution around the Sun.)arrow_forwardA 148 g ball is released from rest H = 1.51 m above the bottom track. It rolls down a straight 45° segment, then back up a parabolic segment whose shape is given by y = x2/4, where x and y are in m. How high will the ball go on the right before reversing direction and rolling back down?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning