Ex. J.7. A ladder 7.5 m long is leaning against a smooth, (frictionless) wall at a point 7.0 m above the ground with its base 2.0 m from the wall. The ladder weighs 200 N and an 800 N painter stands 2/3 of the way up the ladder. (a) What is the normal force? (b) What frictional force must act on the bottom of the ladder to prevent it from slipping for the painter to be safe?

Ex. J.7. A ladder 7.5 m long is leaning against a smooth, (frictionless) wall at a point 7.0 m above the ground with its base 2.0 m from the wall. The ladder weighs 200 N and an 800 N painter stands 2/3 of the way up the ladder. (a) What is the normal force? (b) What frictional force must act on the bottom of the ladder to prevent it from slipping for the painter to be safe?

Related questions

Q: What ROTATIONAL concepts are the HARDEST for you to understand and WHY? pls i need a simple anser…

A: What ROTATIONAL concepts are the HARDEST for you to understand and WHY

Q: 2) The engine in a small airplane is specified to have a torque of 500N.m. The engine drives a 2,…

A: So we are given with :Torque = 500 N/mPropellar ⇒weight = 40Kg Length = 2.0…

Q: The torque is maximum when the angle between the Force and the lever arm is: a) 45 deg b) 180 deg…

A: The torque exerted by a force on a lever arm is given by the formula:Torque=Force ×L ever Arm ×…

Q: The cylindrical, l,4 kag millstone with a radius of 0,2 m reaches angular velocit y an 9 1800 rev/s…

Q: Consider the situation shown in Figure below. The uniform 0.60KN beam is hinged at P. Find the…

Q: 1. (a) A man applies a force of F=3.00x102 N at an angle of 60.0° to the door 2m from the hinges.…

A: F= 300 N, r= 2m

Q: The two requirements for equilibrium are a. (1) v= 0, (2) L = constant b. (1) P = 0, (2) L =…

A: The integral of all the force acting on a body be zero and even the integral of all the torque on…

Q: Figure 7.16 The four forces are the same strength, but they have different effects on the swinging…

Q: Under what conditions can a rotating body be in equilibrium? Give an example.

A: Given: Rotating body

Q: 3. A wheel and axle system consists of two disks which are fastened together. The larger disk has a…

Q: 8.0 N 25 cm 75 cm F If the bar is to be in rotational equilibrium, what Force, F must be applied on…

A: When the bar is in rotational equilibrium, the torque about the dotted point for both forces will be…

Q: How to find the average angular velocity of a rotating rigid body?

A: Angular velocity is the rate of change of angular displacement with respect to time.

Q: Rotational equilibrium is achieved when the sum of all forces acting on an object is zero. True…

A: When the sum of all forces acting on the object is zero, then the object is in translational…

Q: 2. A fan blade has a radius of 0.50 meters, and a rotational inertia of 0.60 kg m?. The fan blade…

A: Solution attached in the photo

Q: In pioneer days, when a Conestoga wagon was stuck in the mud, people would grasp the wheel spokes…

A: The motion of an object is opposed by a force known as friction. Its direction is opposite to the…

Q: Which of the followng Can Never Change Without an external torque? Anguar Velocity Angular…

A: Torque Rotational inertia of a body depends on dimension of the body and the axis of rotation of the…

Q: Make a research about Rotational Equilibrium. Principles and Terminologies 1 problem with solution

Q: What are the factors on which rotational inertia depends?

A: Rotational inertia is the resistance to a change in rotational motion, which is similar to plane…

Q: 9. Using parallel-axis theorem, find the rotational inertia about the axis P of a uniform rod of…

A: solution: Given that L =30 cm =0.3 m m =2 kg To find the inerita about the given axis

Q: Calculate the rotational kinetic energy of a 1.80 kg solid sphere that has a diameter of 9.20 cm…

A: diameter = 9.2 cm radius = diameter/2radius = 9.2/2radius = 4.6 cm w = 445 rpm = 445*2π/60= 46.6…

Q: ate the torque supplied by the wrench when an 8 n in the figure: BN

Q: 82. What force must be applied to end of a rod along the x-axis of length 2.0 m in order to produce…

Q: A torque acting on a rotary body fixed in place tends to produce Group of answer choices…

A: Torque is defined as a measure of the force that produces rotation of an object about an axis.

Q: 5. A hollow sphere with a uniform surface density is rolling over a plane. Its rotational kinetic…

Q: What are units of measurements for rotational speed?

A: There are many units of measurements of rotational speed.

Q: Find out the relation between rotational inertia and the kinetic energy of a rotating rigid body.

A: Relation between rotational inertia and the kinetic energy of a rotating rigid body: Explanation:…

Q: convert a torque value of 47 in*lb into SI units.

Q: What is the torque about the origin of the force (-7.0î – 3.0j + 1.0k) N if it is applied at the…

A: Torque T→=r→XF→the cross product of the position vector (r→) and the…

Q: When opening a door, you push on it perpendicularly with a force of 52.5 N at a distance of 0.775 m…

Question

100%

A Physics problem regarding Rotational Equilibrium.

LESSON 2: ROTATIONAL EQUILIBRIUM
LET'S APPLY!
· Ex. J.7. A ladder 7.5 m long
is leaning against a smooth,
(frictionless) wall at a point
7.0 m above the ground with
its base 2.0 m from the wall.
The ladder weighs 200 N
and an 800 N painter stands
2/3 of the way up the ladder.
(a) What is the normal
force? (b) What frictional
force must act on the bottom
of the ladder to prevent it
from slipping for the painter
to be safe?
7.0 m
-2.0m
HEL10m

Definition Video Definition A state wherein a body is not experiencing any resultant angular acceleration. If the net torque acting on the body is zero, then the body is said to be in rotational equilibrium. If the body is stationary and net torque is zero, then the body is in static rotational equilibrium. If the body is moving with constant velocity and net torque is zero, then, the body is said to be in dynamic rotational equilibrium. Video

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

Calculate rotational equilibrium (picture posted)
Can a single force applied to an object change both its translational and rotational motions? Explain.
8. A supercar engine delivers a power of 895 kW corresponding to a maximum angular speed of 6400 rev/min. What is the torque produce by the engine? a) 668 N⋅m b) 895 N⋅m c) 640 N⋅m d) 1336 N⋅m
When opening a door you push on it perpendicularly with a force of 75 N at a distance of 0.875 m from hinges. What torque , in newton meters are you exerting relative to the hinges?
11. If the ball starts at rest in Item Number 9 and moved 1 revolution around the path in 10 seconds, compute the angular acceleration of the body.
There is an analogy between rotational and linear physical quantities. What rotational quantities are analogous to distance and velocity?
In what way is torque unique?Explain
I need help filling out the table of which forces are being applied, the y, and the torque
A rigid body is rotating. Is it necessary that a net torque acts on the body?
A hollow, spherical shell with mass 3.00 kg rolls without slipping down a 35.0 degree slope. a) Find the acceleration. b) Find the friction force. c) Find the minimum coefficient of static friction needed to prevent slipping.
What is the impetus of rotational motion?
Rotational motion is considered in analyzing static equilibrium problems. Whenever torque equation is used, the axis of rotation to be considered in an object for which these are measured: must be located at the edge of the object. must be located at the object's center of gravity. can be located anywhere. must be located at a pivot.