Question

A firefighter of mass 80kg slides down a vertical pole with an acceleration of 4m/(s^2). Show that the friction force that acts on the fire fighter is 480N

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: 28. The fishing pole in Figure P10.28 makes an angle of W 20.0° with the horizontal. What is the tor...

A: Given: Force, F = 100 NRadius, r = 2 mFind: The torque exerted by the fish about an axis perpendicu...

Q: Kiting during a storm. The legend that Benjamin Franklin flew a kite as a storm approached is only a...

A: Given:

Q: Please help

A: Given,

Q: In this lab you will use a spectrometer to measure the wavelengths ofseveral visible lines emitted f...

A: Energy level diagram showing the first four lines of Balmer series is,

Q: An ac generator with Em = 211 V and operating at 398 Hz causes oscillations in a series RLC circuit ...

A: Since we are entitled to answer up to 3 sub-parts, we’ll answer the first 3 as you have not mentione...

Q: Each of the uncharged capacitors in the figure has a capacitance of 25.8 µF. A potential difference ...

A: When the capacitors are connected in parallel, the total capacitance is the sum of the individual ca...

Q: A generation is about one-third of a lifetime. Approximately how many generations have passed during...

A: Given,

Q: A batted baseball leaves the bat at an angle of 35.0 ∘above the horizontal and is caught by an outfi...

A: (a)The ball is making a projectile motion. The range and angle made by the projectile are given,henc...

Q: Sharon pushes a tall box across the floor. Her arms (and therefore her push force) of F = 400 N make...

A: Given:

Q: 44. Rigid rods of negligible mass lying along the y axis con- nect three particles (Fig. P10.44). Th...

A: Given,

Q: Two rods of equal lengths (1.40 m) are moving as shown in the figure. The speed v1 = 2.00 m/s and th...

A: GivenLength of the rods L = 1.40 mSpeed of the rodsv1 = 2.00 m/sV2 = 1.10 m/sMagnetic field B = 0.45...

Q: Chapter 23, Problem 052 The figure shows a spherical shell with uniform volume charge density ρ = 1....

A: (a)Electric field at a radial distance r=0 from the center of the spherical charge distribution.Sinc...

Q: An alternating source drives a series RLC circuit with an emf amplitude of 6.24 V, at a phase angle ...

A: Write the expression for the resultant emf.

Q: Two large, parallel, conducting plates are 15 cm apart and have charges of equal magnitude and oppos...

A: Given:Distance between two large parallel conducting plates, d= 15 cm =0.15 mEqual and opposite char...

Q: In the figure, the magnetic flux through the loop increases according to the relation ΦB = 4.9t2 + 7...

A: Given,

Q: a boy jumps with a velocity of magnitude 20.0 m/s at an angle of 25.0 degrees above the horizontal. ...

A: Given information: The magnitude of the velocity with which the boy jumps is 20.0 m/s and the angle ...

Q: A child is riding a merry-go-round which completes one revolution every 8.36 s. The child is standin...

A: Write the expression for angular speed of the merry-go-round.

Q: Can you produce current from a magnet and vice versa?

A: Michel Faraday’s experiments on a magnet and a loop of wire explained the relation between electrici...

Q: Tectonic plates are large segments of the earth's crust that move slowly. Suppose one such plate has...

A: Given,

Q: In the figure four particles form a square with edge length a = 3.73 × 10-2 m. The charges are q1 = ...

A: Consider the figure given above, for the particle 1, the net force acting along x direction is given...

Q: Three point-like charges are placed at the corners of a square as shown in the figure, 40.0 cm on ea...

A: The distance between the charges q1 and q3 is equal to the length of the length of the diagonal of t...

Q: Suppose you use an ideal pulley of the type shown in (see attached image) to support a car engine of...

A: a)The relation between tension and weight of load is,

Q: pipe 6-77 Water is flowing into and discharging from U-section as shown in Fig. P6-77. At flange (1)...

A: Let m denotes the mass flow rate, A denotes the area of the opening, P denotes the pressure and ρ de...

Q: What must the separation be between a 4.7 kg particle and a 6.6 kg particle for their gravitational ...

A: Write the expression for gravitational force of attraction.

Q: A 500-kg cannon fires a 4.0-kg projectile with a velocity of 500 m/s relative to the ground. What is...

A: According to the law of conservation of momentum,

Q: A person who weighs 800 N steps onto a scale that is on the floor of an elevator car. If the elevato...

A: Weight is,

Q: The cannon on a battleship can fire a shell a maximum distance of 36.0 km. (a) Calculate the initi...

A: Given:The maximum distance upto which the shell can be fired from the canon aboard a battleship is, ...

Q: Find the components of the vector A⃗ with length a = 1.00 and angle α=20.0 ∘ with respect to the x ...

A: The equation for the magnitude of the x component of the vector is given by

Q: Coefficient of Linear Expansion a x 10-5 Material ах 10-5 Material ('C1) 2.94 1.33 0.899 1.88 1.17 2...

A: Thank you for the question. since we are entitled to answer up to 3 sub-parts, but third and fourth ...

Q: Suppose you design an apparatus in which a uniformly charged disk of radius R is to produce an elect...

A: Given:

Q: Wire C and wire D are made from different materials and have length LC = LD = 3.1 m. The resistivity...

A: The electric potential difference between point 1 and 2 is the potential drop in wire C.Write the ex...

Q: A 1450-kg submarine rises straight up toward the surface. Seawater exerts both an upward buoyant for...

A: The acceleration of the submarine can be calculated using given steps:Given:

Q: A rock is tossed straight up with a speed of 26 m/s . When it returns, it falls into a hole 12 mdeep...

A: Write the kinematic relation between initial and final velocity

Q: A stone is thrown upward from a bridge at a speed of 10m/s. it narrowly misses the bridge on the way...

A: The expression for the height of the bridge from kinematics equation,

Q: 31. A 150-kg merry-go-round in the shape of a uniform, Msolid, horizontal disk of radius 1.50 m is s...

A: Given: mass, m = 150 kgradius = 1.50 mAngular speed = 0.5 rev/sTime, t = 2 sFind: The force exerted...

Q: Can you show me how to work this? I’m thinking I’m getting confused on the units. Thanks!

A: The ideal gas equation is,

Q: Suppose you use an ideal pulley of the type shown in (attached image) and find it necessary to exert...

A: a)The relation between tension and weight of load is,

Q: In the figure particles with charges q1 = +6e and q2 = -14e are fixed in place with a separation of ...

A: Given,

Q: One simple model for a person running the 100 m dash is to assume the sprinter runs with constant ac...

A: Given information: The maximum speed of the sprinter is 11.5 m/s, time taken to reach the maximum sp...

Q: A man stands on a platform that is rotating (without friction) with an angular speed of 1.39 rev/s; ...

A: a) The law of conservation of angular momentum can be applied to the given situation. Let the initia...

Q: A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-power...

A: The work done on the jet by the catapult can be calculated using given steps:Given:

Q: Chapter 28, Problem 006 Your answer is partially correct. A proton moves through a unform magneic te...

A: Given:

Q: The riders push on the mower with a constant force of 45 Newtons for an hour.Using v = 0.40 m/sec, t...

A: Given:

Q: The electric field lines form a uniformly charged sphere carrying positive charge all point radially...

A: The equipotential surfaces are denoted as dotted concentric circles in the diagram below.

Q: Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are ...

A: Click to see the answer

Q: Two children push on opposite sides of a door during play. Both push horizontally and perpendicular ...

A: Since, the door is held at rest this signifies that the torque exerted by the first child balances t...

Q: The figure shows two concentric rings, of radii R and R' = 2.54R, that lie on the same plane. Point ...

A: write the expression of electric field on the axis of the small ring.

Q: An open top tank half filled with water is to be transported constant acceleration. The dimensions o...

A: 2.Slope of the free surface of the liquid is,

Q: What is the force( magnitude and direction) on an electron moving horizontally west at a speed of 3x...

A: Force on the electron is,

Q: In the figure a small, nonconducting ball of mass m = 0.77 mg and charge q = 2.5 × 10-8 C (distribut...

A: The horizontal force balanced on the ball is,The vertical force balanced on the ball is,