Question 26 (1 point) A 25-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.40. A horizontal 72-N force is applied to the box, but the box does not move. What is the friction force from the surface that is exerted on the box? Record Answer Question 27 (t point) d young driver is traveling at a constant speed of 59 m/s drives in a circle track that is 5o0 m across What is the size ofthe acceleraton of the car?
Homework Answers
Ques 26:
If the box does not move even after applying 72 N horizontal force on it, the force of static friction from the surface must be equal to the horizontal force applied on the box and is equal to 72N (ans)
Ques 27:
Diameter of the circular path, d =500m
radius of the circular path, r = (d/2) =250 m
speed of the car, v = 56 m/s
magnitude of acceleration, a = (v2 / r) = ((56)2 / 250) = 12.544 m/s2 (ans)
Add Answer to:
need help on both 26 and 27 26 i need help A 25-kg box rests on a horizontal surface. the coefticient or stac...
A) A 50.0 kg box rests on a horizontal surface. The coefficients of static and kinetic...
A) A 50.0 kg box rests on a horizontal surface. The coefficients of static and kinetic friction between the box and the surface are 0.300 and 0.200, respectively. What is the friction force on the box if a horizontal 175 N push is applied to it? Explain. B) A horizontal force of 250 N is applied to the box. After the box moves a distance d from rest, the speed of the box is measured to be 6.4 m/s. use...
An 85 kg box rests on a horizontal surface. The coefficient of static friction between the...
An 85 kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.50. A horizontal force 250 N force is applied to the box. What is the magnitude of the static friction force on the box? A.42N B.250N C.16.5N D.130N E.0.00N
4. A 55 kg box rests on a horizontal surfcion betwce the box and the surface is 0.30, and the coe...
#4 and #5!!
4. A 55 kg box rests on a horizontal surfcion betwce the box and the surface is 0.30, and the coefficient of kinetic friction is 0.20. What horizontal force must be applied to the box to cause it to start sliding along the surface? 4 :0 ovit 5. A projectile is launched at ground level with an initial speed of 50.0 m/s at an angle of 300 above the horizontal. It strikes a target above the ground...
Please help!!! 12. A bureau rests on a rough horizontal surface (mus = 0.50, muk =...
Please help!!!
12. A bureau rests on a rough horizontal surface (mus = 0.50, muk = 0.40). A constant horizontal force, just sufficient to start the bureau in motion, is then applied. The acceleration of the bureau is: A. 0 B. 0.98 m/s^2 C. 3.3 m/s^2 D. 4.5 m/s^2 E. 8.9 m/s^2 ans: B 13. A car is travelling at 15 m/s on a horizontal road. The brakes are applied and the car skids to a stop in 4.0 s....
A force of 10.5 N is used to move a box on a horizontal, friction-free surface,...
A force of 10.5 N is used to move a box on a horizontal, friction-free surface, at a distance of 8.5 m. (a) Determine the work that the force performs on the box. (b) What work does the force do if you move the box on a 30 degree surface at a distance of 4.5 m? 10 point
please answer both questions please 9. A 25 kg block is at rest on a horizontal...
please answer both questions please
9. A 25 kg block is at rest on a horizontal surface. A 100 N force is applied at an angle of 30° above the horizontal. The coefficients of friction are us = 0.6 and Hk = 0.5 What is the acceleration of the block while the force is being applied? F = 100 N 30° HA=0. 6 25 kg = 0.5 5. A toy car goes down a track with a loop. The loop...
Question 26 (2.5 points) A 65.0 kg box is at rest on a rough horizontal surface....
Question 26 (2.5 points) A 65.0 kg box is at rest on a rough horizontal surface. A man pushes horizontally on the box, first with a constant force of 500.0 N. After a time, the pushing force is increased, and then finally he stops pushing and loses contact with the box. What minimum coefficient of static friction is necessary to keep the box from moving during part A? Pushing
Question 12 (1 point) A 50.0-kg box is resting on a horizontal floor. A force of...
Question 12 (1 point) A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 20.7° below the horizontal is applied to the box. The coefficient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box? OA) 3.54 m/s2 OB) 5.14 m/s2 OC) 2.84 m/s2 OD) 1.21 m/s2 E) 1.77 m/s2 Question 13 (1 point) A 50.0-kg box is resting on a horizontal floor....
27 only (26) A block of mass mi located on a horizontal frictionless surface is connected...
27 only
(26) A block of mass mi located on a horizontal frictionless surface is connected by a light non-stretchable cord that passes over a massless frictionless pulley to a second block of mass m2, which is allowed to move on an inclined friction- less plane of angle e, as shown in Fig. 5.37. Find the acceleration of the two blocks and the tension in the cord when mı = 2 kg, m2 =6 kg, sin 0 =4/5, and cos...
QUESTION 1 Part A A box of mass m1 rests on a smooth, horizontal floor next...
QUESTION 1 Part A A box of mass m1 rests on a smooth, horizontal floor next to a box of mass m2. Suppose the force of 20.0 N pushes on two boxes of unknown mass. We know, however, that the acceleration of the boxes is 1.20 m/s2 and the contact force has a magnitude of 4.45 N. Find the mass of box 1 and box 2. Express your answers using three significant figures separated by a comma. QUESTION 2 A...
#4 and #5!!
4. A 55 kg box rests on a horizontal surfcion betwce the box and the surface is 0.30, and the coefficient of kinetic friction is 0.20. What horizontal force must be applied to the box to cause it to start sliding along the surface? 4 :0 ovit 5. A projectile is launched at ground level with an initial speed of 50.0 m/s at an angle of 300 above the horizontal. It strikes a target above the ground...
Please help!!!
12. A bureau rests on a rough horizontal surface (mus = 0.50, muk = 0.40). A constant horizontal force, just sufficient to start the bureau in motion, is then applied. The acceleration of the bureau is: A. 0 B. 0.98 m/s^2 C. 3.3 m/s^2 D. 4.5 m/s^2 E. 8.9 m/s^2 ans: B 13. A car is travelling at 15 m/s on a horizontal road. The brakes are applied and the car skids to a stop in 4.0 s....
please answer both questions please
9. A 25 kg block is at rest on a horizontal surface. A 100 N force is applied at an angle of 30° above the horizontal. The coefficients of friction are us = 0.6 and Hk = 0.5 What is the acceleration of the block while the force is being applied? F = 100 N 30° HA=0. 6 25 kg = 0.5 5. A toy car goes down a track with a loop. The loop...
Question 26 (2.5 points) A 65.0 kg box is at rest on a rough horizontal surface. A man pushes horizontally on the box, first with a constant force of 500.0 N. After a time, the pushing force is increased, and then finally he stops pushing and loses contact with the box. What minimum coefficient of static friction is necessary to keep the box from moving during part A? Pushing
Question 12 (1 point) A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 20.7° below the horizontal is applied to the box. The coefficient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box? OA) 3.54 m/s2 OB) 5.14 m/s2 OC) 2.84 m/s2 OD) 1.21 m/s2 E) 1.77 m/s2 Question 13 (1 point) A 50.0-kg box is resting on a horizontal floor....
27 only
(26) A block of mass mi located on a horizontal frictionless surface is connected by a light non-stretchable cord that passes over a massless frictionless pulley to a second block of mass m2, which is allowed to move on an inclined friction- less plane of angle e, as shown in Fig. 5.37. Find the acceleration of the two blocks and the tension in the cord when mı = 2 kg, m2 =6 kg, sin 0 =4/5, and cos...
Most questions answered within 3 hours.
-
For Bergson the concept of Being contains less reality than does
the concept of Becoming. True...
asked 44 minutes ago -
What is the hydroxide ion concentration, [OH-], in a solution
with a hydronium ion concentration, [H3O+]...
asked 30 minutes ago -
What species is the reducing agent in the following
equation?
Mg(s) + 2HCl (aq) --> MgCl2(aq)...
asked 46 minutes ago -
A 50g ice cube is taken out of a freezer at 0 degrees Celsius
and put...
asked 2 hours ago -
How do ratios help you determine trends? What specific
information do managers look at? Is there...
asked 2 hours ago -
A wavelength of 514 nm is used to find an unknown diffraction
grating. If the separation...
asked 2 hours ago -
Use the central limit theorem to find the mean and standard
error of the mean of...
asked 2 hours ago -
You will be given a file that will contain averages for classes
which are divided into...
asked 2 hours ago -
A Pew Research Center poll surveyed a random sample 850 voters
and asked them if they...
asked 3 hours ago -
Design a class named
NumDays, to
store a value that represents a number of hours and...
asked 3 hours ago -
(R)-2-chloro-(S)-3-bromobutane and
(S)-2-chloro-(S)-3-bromobutane are: A. enantiomers. B.
diastereomers. C. meso compounds. D. the same molecule.
asked 3 hours ago -
1_ What is the Frank-Starling law of the heart? And why the
heart cannot function on...
asked 3 hours ago