A light block of mass m and a heavy block of mass M are attached to the ends of a rope. A student holds the heavier block and lets the lighter block hang below it, as shown in Figure Q5.6. Then she lets go. Air resistance can be neglected.
Figure Q5.6
a. What is the tension in the rope while the blocks are falling, before either hits the ground?
b. Would your answer be different if she had been holding the lighter block initially?
Want to see the full answer?
Check out a sample textbook solutionChapter 5 Solutions
College Physics: A Strategic Approach (4th Edition)
Additional Science Textbook Solutions
Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
University Physics with Modern Physics (14th Edition)
Cosmic Perspective Fundamentals
The Cosmic Perspective
University Physics (14th Edition)
- (a) A cat with a mass of 850 kg in moving to the right with a constant speed of 1.44 m/s. What is the total force on the cat ? (b) What is the total force on the cat if it is moving to the left?arrow_forwardA ball hanging from a light string or rod can be used as an accelerometer (a device that measures acceleration) as shown in Figure P5.18. What force causes the deflection of the ball? Is the cart in the lower part of the photo an inertial reference frame? How can the balls deflection be used to find the carts acceleration? In which direction is the cart accelerating? Explain your answers.arrow_forwardMass and Weight The weight of an astronaut plus his space suit on the Moon is only 250 N. (a) How much does the suited astronaut weigh on Earth? (b) What is the mass on the Moon? On Earth?arrow_forward
- A 12.1-kg box starting at rest on a horizontal floor is acted on by a net horizontal force of 6.05 N. a. What is the magnitude of the box's acceleration? b. How far does it travel in 10.0 seconds? c. What is its speed at that time?arrow_forwardQ5. A 50.4 N force is applied to keep a blok of 24.2 N on the side wall. The static and the kinetic friction coefficients are given as 0.60 and 0.40. Assume the blok is relased from stationary state, a. Does the block start to move? b. What force the wall apply to the block?arrow_forwardA 20.0 kg block is placed on an incline that makes an angle of 30.0°. A man pushes up on the block parallel to the incline to keep it from sliding down. He must apply a force of 50.0 N. A. What is the coefficient of friction? B. If the man lets go of the block, what is its acceleration? C. How far will the block slide down the incline in 2.00 s?arrow_forward
- a. You are a newly graduated astronaut preparing for your first trip into space. Plans call for your spacecraft to reach a velocity of 500. m/s after 2.40 minutes. If you weigh 735 N, what force will be exerted on your body? Assume the acceleration is constant. b. A car is traveling at 25 m/s when the driver spots a large pothole in the road a distance of 30 m ahead. He immediately applies the brakes. If his acceleration is -27 m/s^2, does he manage to stop before reaching the pothole?arrow_forwardAsaparrow_forwardA 50 kg box hangs from a rope. What is the tension in the rope ifa. The box is at rest?b. The box has νy = 5.0 m/s and is speeding up at 5.0 m/s2?arrow_forward
- Box A has mass 4.50 kg, and box B has mass 13.0 kg. The coefficient of kinetic friction between box B and the horizontal surface is 0.20. a. What is the tension in each chain when box B is moving to the right and speeding up with an acceleration of 2.20 m/s2? b. What is the mass of box C if box B has this acceleration? C A.arrow_forward21. A child pushes a 315 g toy truck across a horizontal rough surface. (coefficient of kinetic friction, ux = 0.73). a. Draw a formal free-body diagram of the toy truck if it is being pushed horizontally to the right. b. What total force must the child apply to push the truck at a constant speed? 22. A 1600 g tool is thrown at 15.0 m/s, 40° above the horizontal from the top of an 80.0 m building under construction. How long does it take to hit the ground? Draw a vector diagramarrow_forwardYou push a 40.0 kg box across a floor at a constant velocity of 1.00 m/s. the coefficient of kinetic friction is ?k = 0.15. a. Draw a free body diagram. b. Decide of which type of problem-solving technique you need, inertial or dynamic. c. Determine the value of your push in newtonsarrow_forward
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice UniversityPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning