A 15.0-lb block rests on a horizontal floor. (a) What force does the floor exert on the block? (b) A rope is tied to the block and is run vertically over a pulley. The other end is attached to a free-hanging 10.0-lb object. What now is the force exerted by the floor on the 15.0-lb block? (c) If the 10.0-lb object in part (b) is replaced with a 20.0-lb object, what is the force exerted by the floor on the 15.0-lb block?

A 15.0-lb block rests on a horizontal floor. (a) What force does the floor exert on the block? (b) A rope is tied to the block and is run vertically over a pulley. The other end is attached to a free-hanging 10.0-lb object. What now is the force exerted by the floor on the 15.0-lb block? (c) If the 10.0-lb object in part (b) is replaced with a 20.0-lb object, what is the force exerted by the floor on the 15.0-lb block?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter4: Newton's Laws Of Motion

Section4.6: Applications Of Newton's Laws

Problem 4.9QQ: For the woman being pulled forward on the toboggan in Figure 4.33, is the magnitude of the normal...

See similar textbooks

Similar questions

For the woman being pulled forward on the toboggan in Figure 4.33, is the magnitude of the normal force exerted by the ground on the toboggan (a) equal to the total weight of the woman plus the toboggan, (b) greater than the total weight, (c) less than the total weight, or (d) possibly greater than or less than the total weight, depending on the size of the weight relative to the tension in the rope?
A worker pulls a 15-kg crate in a straight line on a level surface by imparting a horizontal tension of 80 N to the free end of a cable whose other end is attached to the crate. If the coefficient of static friction is 0.40, what is the acceleration of the crate?
A block of mass 2.63 kg is hung at the midpoint of a string that is attached to the top of a 2-m tall pole at one end and to the top of another 2-m tall pole that is 5 m away at its other end. If due to the weight of the block the string deviates by 6.5º from the horizontal on each side of the block, what is the tension in the string?
A dockworker adjusts rope which keeps a ship from drifting alongside a wharf. If he exerts a pull of 200 N on the rope, which has turns of 1 ¼ around the mooring bit, what force T can he support? The coefficient of friction between the rope and the cast-steel mooring bit is 0.30
A boy has stacked two blocks on the floor so that a 5.00kgblock is on top of a1.60kg block. If the coefficient of static friction between the two blocks is 0.400 and the coefficient of static friction between the bottom block and the floor is 0.220,with what minimum force should the boy push horizontallyon the upper block to make both blocks start to slide together along the floor?
The masses of the red and blue wagons are 6.09 kg and 2.63 kg, respectively. If the red wagon is pulled by 18.9 N force, the tension (N) in the cable connecting the two wagon of the system is:
What is the magnitude of the static friction force required to keep a 2.00 kg block resting on an inclined plane at an angle 25 degrees? If the angle was increased, such that the incline plane was steeper, would the magnitude of the static friction force required to hold the block at rest increase, decrease, or stay the same?
Consider a 25-N weight suspended by two wires as shown in the accompanying figure. If the magnitudes of vectors F1 and F2 are both 75 N, then angles a and b are equal. Find a.
A 4.00 kg block rests on a 30 degree incline. If the coefficient of the static friction between the block and the incline is 0.700, what magnitude of horizontal force F must act on the block to start it moving up the incline?
A box of mass 30.0 kg is acted on by a constant horizontal force, which moves the box from rest 15.0 m in 2.75 s. What is the magnitude of the force acting on the box? (Ignore any frictional forces.)
When a 100 N bag of nails hangs motionless from a single vertical strand of rope, how many newtons of tension are exerted in the strand? What if the bag is supported by four vertical strands?
An object of mass, m, is suspended by two cords connected to a wall and to a 5.0 kg block resting on a table as shown. A coefficient of friction of 0.47 exists between the 5.0 kg block and the table. a) Draw an FBD for block with mass 5.0 kg. Determine the magnitudes of the tension in the horizontal rope (T1) and of the normal force acting on block. (FN). b) Draw an FBD of point of connection of three ropes. Calculate the tension T2 on the rope that form an angle 0 = 32° with the wall. c) Draw an FBD for unknown mass. Determine the magnitude of the tension in the vertical rope (T3) and the unknown mass.