62. A small block of mass 200 g starts at rest at A, slides to B where its speed is U B = 8.0 m/s, then slides along the horizontal surface a distance 10 m before coming to rest at C. (See below.) (a) What is the work of friction along the curved surface? (b) What is the coefficient of kinetic friction along the horizontal surface? A 4.0 m В 10 m
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- S 10. A box of mass 7.60 kg is pulled from rest up a 46.5 m long incline that makes an angle of 22.0° with horizontal. The coefficient of kinetic friction between the box and the incline is 0.200. At the top of the incline, the speed of the box is 4.50 m/s. What is the work done by the pulling force? J E L C 2 R F 5 T G 6 MacBook Air B 00 S Y 7 Submit Assignment H S N J 9 M K MOSISO ge commandA 0.41-kg particle has a speed of 3.0 m/s at point A and kinetic energy of 8.0 J at point B. (a) What is its kinetic energy at A? (b) What is its speed at point B? m/s (c) What is the total work done on the particle as it moves from A to B? JEarly one October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 3.0 kg pumpkin to a height of 1.3 m , then carry it 50.0 m (on level ground) to the check-out stand. Calculate the work you do on the pumpkin as you lift it from the ground. How much work do you do on the pumpkin as you carry it from the field?
- A 0.200-kg particle has a speed of 1.50 m/s at point and kinetic energy of 7.10 J at point B. (a) What is its kinetic energy at ? J (b) What is its speed at B? m/s (c) What is the net work done on the particle by external forces as it moves from J to Ⓡ?How much work must be done by frictional forces in slowing a 1000.0 kg car from 19.8 m/s to rest? O 6.22 x 105 J 1.96 x 105 J 5.33 x 105 J 4.44 x 105 J 3.55 x 105 JA 2.0 kg bock of slippery cheese slides along a frictionless track from point a to point b. The cheese travels through a total distance of 20.0 m along the track and a net vertical distance of 8.4 m. Determine how much work is done on the cheese by gravitational force during the slide. Use g = 10 N/kg.
- A 300-g block is dropped onto a relaxed vertical spring that has a spring constant k-210.0 N/m. The block becomes attached to the spring and compresses the spring 38.5 cm before momentarily stopping. While the spring is being compressed, what work is done on the block by the gravitational force on it? SA Tries 0/5 While the spring is being compressed, what work is done on the block by the spring force? SubArTries 0/5 What is the speed of the block just before it hits the spring? (Assume that friction is negligible.) Tries 0/5 If the speed at impact is doubled, what is the maximum compression of the spring? SA Tries 0/5 Post Discussion Send Feedbackpls help not in scientific notation plsA 6 kg block initially at rest is pulled to the right along a rough surface ( c) by a constant horizontal force of F = 12 N at an angle 0 = 30° as shown in the figure. The block is moved over a distance of 3 m and Its final speed is 2 m/s. F Find the following : 1. The normal force? 2. The work done by force F? 3. The total work done on the block? 4. The work done by frictional force? 5. The kinetic frictional force (f)? 6. The coefficient of kinetic friction (u,) between the block and the surface ? 7. The increase in the internal energy?
- 14. A coin slides over a frictionless plane and across an y coordinate system from the origin to a point with ry coordinates (3.0 m, 4.0 m) while a constant force acts on it. The force has magnitude 2.0N and is directed at a counterclockwise angle of 100 from the positive direction of the r axis. How much work is done by the force on the coin during the displacement?9. A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal. The man was able to push it to a distance of 5.0Om along the slope with a force parallel also to the slope. However the speed of the crate decreases at a rate of 1.5 m/s?. The work being done by the man is: A. -200 J В. 61J С. 140 J D. 200 J 14. A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m its kinetic energy is approximately: A. 4800 J В. 3500J C. 1200 J D. 120 JA small block of mass 230 g starts at rest at A, slides to B where its speed is v = 7.8 m/s, then slides along the horizontal surface a distance 13 m before coming to rest at C. (See below.) 4.0 m B 13 m (a) What is the work of friction along the curved surface (in J)? (b) What is the coefficient of kinetic friction along the horizontal surface?