Homework Answers
1)
gravity, normal, the force of the student pushing on the chair
=======
2)
workdone by friction
W = Fd = - 4 * 8 = - 32 N
Comment in case any doubt please rate my answer...
Add Answer to:
ils (1) A student is sitting motionless in physics class. What forces act on the student?...
A block with a mass of 4 kg is sliding across a horizontal surface with an...
A block with a mass of 4 kg is sliding across a horizontal surface with an initial speed of 5 m/s. Because of kinetic friction, the energy of this system will decrease linearly with the distance travelled by the block. a. What is the magnitude of the force of kinetic friction (in N) acting on the block if the block moves 4 m before coming to a stop? b. What is the average power (in W) supplied by the force...
A physics student pulls a block of mass m = 22 kg up an incline at...
A physics student pulls a block of mass m = 22 kg up an incline
at a slow constant velocity for a distance of d = 4.5 m. The
incline makes an angle ? = 32° with the horizontal. The coefficient
of kinetic friction between the block and the inclined plane is µk
= 0.3.
1) What is the work Wm done by the student?
2) At the top of the incline, the string by which she was pulling
the...
PHYSICS HOMEWORK # 26 NEWTON'S LAWS FIRST LAW & FRICTION 24. Two masses are sitting on...
PHYSICS HOMEWORK # 26 NEWTON'S LAWS FIRST LAW & FRICTION 24. Two masses are sitting on a horizontal surface as shown to the right. The coefficient of sliding friction between these two masses and the horizontal surface is m-0.520. A string is attached to the end of mas m,8.00 kg. This string is then looped arounda pulley and is finally attached to the left vertical surface. The pulley is attached to mass m 12.0 kg as shown and then a...
Three forces, F_1 = 40 N, F_2 = 20 N and F_3 = 10 N, are...
Three forces, F_1 = 40 N, F_2 = 20 N and F_3 = 10 N, are acting on a block of mass 4 kg as shown. The block is sitting on a horizontal surface with coefficient of kinetic friction mu_k = 0.12. The angle between F_1 and F_2 is 30 degree. What is the magnitude of: a) the friction force k_k? b) the resulting acceleration of the block in x-axis?
A) A massless rope is tied to a 1.82 kg box sitting on a rough, horizontal...
A) A massless rope is tied to a 1.82 kg box sitting on a rough, horizontal surface. The rope is pulled with constant force F acting upward at an angle 15.8o to the horizontal. The coefficient of kinetic friction between the box and the surface is 0.217, and the box slides at constant speed along the table for a distance of 84.4 m. Find the total work done by F, in J. B)Josh, mass 143 kg, is racing against his...
16. Two forces F, and F2 act on the 8.5kg block shown in the drawing below...
16. Two forces F, and F2 act on the 8.5kg block shown in the drawing below in addition to the normal force and gravity. The magnitudes of the forces are F1-55N and F2 = 20N which is the friction. a. Use the blank x,y graph to the right below to depict all of the forces acting on the block. Hint: Draw all of the forces originating from the origin, and be assured that the object will not travel downward through...
The student with mass 70 ke is sitting in the front row in physics class. The...
The student with mass 70 ke is sitting in the front row in physics class. The instructor with mass 90 kg is standing 3.0 m in front of the student Part A Estimate the gravitational force that the instructor exerts on the student. Express your answer with the appropriate units. HA ? Value Ptr = Units Request Answer Submit Part B How does the magnitude that you estimate for this force compare with the gravity force exerted on the student...
The student with mass 60 kg is sitting in the front row in physics class The...
The student with mass 60 kg is sitting in the front row in physics class The instructor with mass 90 kg is standing 3.0 m in front of the student Part A Estimate the gravitational force that the instructor exerts on the student Express your answer with the appropriate units. PAO ? Finste Value Units Submit Request Answer Part 8 How does the magnitude that you estimate for this force compare with the gravity force exerted on the student by...
Review I Constants The student with mass 65 kg is sitting in the front row in physics class. The instructor w...
Review I Constants The student with mass 65 kg is sitting in the front row in physics class. The instructor with mass. 80 kg is standing 3.0 m in front of the student. Submit Previous Answers Completed Part B How does the magnitude that you estimate for this force compare with the gravity force exerted on the student by the earth? Express your answer numerically. Fnstr/Fearth Review I Constants The student with mass 65 kg is sitting in the front...
Which ones did I get wrong ? kg block is sitting on a ramp that makes...
Which ones did I get wrong ?
kg block is sitting on a ramp that makes a 20 degree angle with the horizontal. What is the 1) A magnitude of the normal force exerted by the block on the ramp? A between 0 and 10 N between 10 and 20 N C) between 40 and 50 N D) between 20 and 30 N E) None of the above Which of the following is NOT true about forces? 2) A) Gravitational...
A physics student pulls a block of mass m = 22 kg up an incline
at a slow constant velocity for a distance of d = 4.5 m. The
incline makes an angle ? = 32° with the horizontal. The coefficient
of kinetic friction between the block and the inclined plane is µk
= 0.3.
1) What is the work Wm done by the student?
2) At the top of the incline, the string by which she was pulling
the...
PHYSICS HOMEWORK # 26 NEWTON'S LAWS FIRST LAW & FRICTION 24. Two masses are sitting on a horizontal surface as shown to the right. The coefficient of sliding friction between these two masses and the horizontal surface is m-0.520. A string is attached to the end of mas m,8.00 kg. This string is then looped arounda pulley and is finally attached to the left vertical surface. The pulley is attached to mass m 12.0 kg as shown and then a...
Three forces, F_1 = 40 N, F_2 = 20 N and F_3 = 10 N, are acting on a block of mass 4 kg as shown. The block is sitting on a horizontal surface with coefficient of kinetic friction mu_k = 0.12. The angle between F_1 and F_2 is 30 degree. What is the magnitude of: a) the friction force k_k? b) the resulting acceleration of the block in x-axis?
16. Two forces F, and F2 act on the 8.5kg block shown in the drawing below in addition to the normal force and gravity. The magnitudes of the forces are F1-55N and F2 = 20N which is the friction. a. Use the blank x,y graph to the right below to depict all of the forces acting on the block. Hint: Draw all of the forces originating from the origin, and be assured that the object will not travel downward through...
The student with mass 70 ke is sitting in the front row in physics class. The instructor with mass 90 kg is standing 3.0 m in front of the student Part A Estimate the gravitational force that the instructor exerts on the student. Express your answer with the appropriate units. HA ? Value Ptr = Units Request Answer Submit Part B How does the magnitude that you estimate for this force compare with the gravity force exerted on the student...
The student with mass 60 kg is sitting in the front row in physics class The instructor with mass 90 kg is standing 3.0 m in front of the student Part A Estimate the gravitational force that the instructor exerts on the student Express your answer with the appropriate units. PAO ? Finste Value Units Submit Request Answer Part 8 How does the magnitude that you estimate for this force compare with the gravity force exerted on the student by...
Review I Constants The student with mass 65 kg is sitting in the front row in physics class. The instructor with mass. 80 kg is standing 3.0 m in front of the student. Submit Previous Answers Completed Part B How does the magnitude that you estimate for this force compare with the gravity force exerted on the student by the earth? Express your answer numerically. Fnstr/Fearth Review I Constants The student with mass 65 kg is sitting in the front...
Which ones did I get wrong ?
kg block is sitting on a ramp that makes a 20 degree angle with the horizontal. What is the 1) A magnitude of the normal force exerted by the block on the ramp? A between 0 and 10 N between 10 and 20 N C) between 40 and 50 N D) between 20 and 30 N E) None of the above Which of the following is NOT true about forces? 2) A) Gravitational...
Most questions answered within 3 hours.
-
1-The Electrons in a beam are moving at 2.7×108 m/s in an
electric field of 15000...
asked 5 minutes ago -
A gas tank is a vertical cylinder. It has a radius of 1m, a
height of...
asked 32 minutes ago -
Accent Software faces the following conditions. All of these
support Accent’s use of a market-penetration pricing...
asked 1 hour ago -
A mathematically inclined friend emails you the following
instructions: "Meet me in the cafeteria the first...
asked 1 hour ago -
A monopoly sells in two countries . The demand curves in the two
countries are p1...
asked 2 hours ago -
A .15kg rubber ball is bounced off a wall. Before hitting the
wall, the ball moves...
asked 3 hours ago -
A manufacturing company preparing to build a new plant is
considering three potential locations for it....
asked 3 hours ago -
B. If compound Y has approximately the same values of solubility
in toluene as compound X,...
asked 3 hours ago -
Oscar Inc. has inventory in Japan valued at 39,051,000 Yen one
year ago. One year ago...
asked 4 hours ago -
If Canada suffered from "fundamental disequilibrium," and its
government choose not to devalue its currency, a...
asked 4 hours ago -
4. How many input & output Key Value Pairs are passed into,
and emitted out of...
asked 4 hours ago -
Why would your heart not function well if constructed of
skeletal muscle? What is the particular...
asked 4 hours ago