The puck in the figure below has a mass of 0.120 kg. The distance of the puck from the center of rotation is originally 43.5 cm, and the puck is sliding with a speed of 80.0 cm/s. The string is pulled downward 14.0 cm through the hole in the frictionless table. Determine the work done on the puck. (Suggestion: Consider the change of kinetic energy.) 0 R

The puck in the figure below has a mass of 0.120 kg. The distance of the puck from the center of rotation is originally 43.5 cm, and the puck is sliding with a speed of 80.0 cm/s. The string is pulled downward 14.0 cm through the hole in the frictionless table. Determine the work done on the puck. (Suggestion: Consider the change of kinetic energy.) 0 R

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Two blocks, A and B (with mass 30 kg and 110 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is u, = 0.21. Determine the change in the kinetic energy of block A as it moves from to 0 a distance of 24 m up the incline (and block B drops downward a distance of 24 m) if the system starts from rest. A 37°
A student skates up a ramp that makes an angle 30° with the horizontal. He/she starts (as shown in the figure) at the bottom of the ramp with speed ?0 and wants to turn around over a semi-circular path xyz of radius R during which he/she reaches a maximum height h (at point y) from the ground as shown in the figure. Assume that the energy loss is negligible and the force required for this turn at the highest point is provided by his/her weight only. Then (g is the acceleration due to gravity) a) v02 - 2gh = (1/2) gR b) v02 - 2gh = (√3/2) gR c) the centripetal force required at points x and z is zero d) the centripetal force required is maximum at points x and z
The drawing shows two resting boxes on two ramps sin friction. One box is much heavier than the other. If the boxes come loose. Questions: (A) Which of them will have a greater speed when reaching point B? (B) which of them will it have a higher kinetic energy when it reaches point B? Problems: The mass of the boxes is 11 and 44 kg respectively. Height in point A is 4.5 m and the height at point B is 1.5 m. Determine (a) the speed of both boxes (b) The ratio of the kinetic energy of the box plus heavy compared to the lightest.
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in the figure. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline isμk=0.25. Determine the change in the kinetic energy of block A as it moves from C to D, a distance of 20 m up the incline if the system starts from rest.
Consider the system shown below (Figure 1). The rope and pulley have negligible mass, and the pulley is frictionless. Initially the 6.00 kgkg block is moving downward and the 8.00 kgkg block is moving to the right, both with a speed of 0.600 m/sm/s. The blocks come to rest after moving 3.50 mm. Use the work-energy theorem to calculate the coefficient of kinetic friction between the 8.00 kgkg block and the tabletop.
A 27.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 26.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. m/s (b) If the actual speed of the child at the lowest position is 2.10 m/s, what is the mechanical energy lost due to friction?
Question 3
The loaded cab of an elevator has a mass of 4.20 x 10³ kg and moves 242. m up the shaft in 17.0 s at constant speed. At what average rate does the force from the cable do work on the cab?
mass of pulley = 0
An initially (t = 0) stationary 2.0 kg object accelerates horizontally and uniformly to a speed of 10 m/s in 4.0 s. What is the instantaneous power due to the force accelerating the object at t = 2.0 s?
A cart with a mass of 1.25 kg is rolling down an inclined plane at a speed of 1.76 m/s at the instant it is 2.50 m from the end of the incline. If the incline is tilted at an angle of 52.0° to the horizontal, the mechanical energy of the cart relative to the base of the plane is J. Enter your three-digit answer.
Same set-up for the conservation of energy was performed. The 5-g marble covered a horizontal distance of 40 cm from the edge of the ramp (horizontal) from an elevation of 15 cm above the ground. What is the time (in seconds) needed for the marble to fall from the edge of the ramp to the ground? Use g=9.8m/s2. Round off your answer to two decimal places.