Science

PhysicsQ&A LibraryYou are a member of an alpine rescue team and must get a box of supplies, with mass 2.80 kg , up an incline of constant slope angle 30.0 degrees so that it reaches a stranded skier who is a vertical distance 3.10 m above the bottom of the incline. There is some friction present; the kinetic coefficient of friction is 6.00×10^−2. Since you can't walk up the incline, you give the box a push that gives it an initial velocity; then the box slides up the incline, slowing down under the forces of friction and gravity. Take acceleration due to gravity to be 9.81 m/s2. Use the work-energy theorem to calculate the minimum speed v that you must give the box at the bottom of the incline so that it will reach the skier.Start your trial now! First week only $4.99!*arrow_forward*

Question

You are a member of an alpine rescue team and must get a box of supplies, with mass 2.80 kg , up an incline of constant slope angle 30.0 degrees so that it reaches a stranded skier who is a vertical distance 3.10 m above the bottom of the incline. There is some friction present; the kinetic coefficient of friction is 6.00×10^−2. Since you can't walk up the incline, you give the box a push that gives it an initial velocity; then the box slides up the incline, slowing down under the forces of friction and gravity. Take acceleration due to gravity to be 9.81 m/s2. Use the work-energy theorem to calculate the minimum speed v that you must give the box at the bottom of the incline so that it will reach the skier.

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: 1.5 Assume that a 20 V voltage drop occurs across an element from terminal 2 to terminal 1 and that ...

A: Given : Voltage (v) = 20 V Current (i) = 4 A

Q: The small piston of a hydraulic lift (Fig. Pl14.8) has a cross-sectional area of 3.00 cm², and its l...

A: Click to see the answer

Q: (a) Calculate the force needed to bring a 1100 kg car to rest from a speed of 90.0 km/h in a distanc...

A: mass of car = 1100 kg initial speed = 90km/hr = 90 * 5/18 = 25 m/sfinal speed = 0 m/sdistance = 12...

Q: The lowest frequency in the FM radio band is 88.0 MHz. (a) What inductance is needed to produce this...

A: Click to see the answer

Q: The atmospheric pressure on the surface of Venus is 90. atm. Calculate the atmospheric pressure in k...

A: The one atmospheric pressure is, 1 atm=101.325 kPa The atmospheric pressure on Venus is, Pv=90 atm

Q: The string at the right is 6.0 meters long and is vibrating as the third harmonic. The string vibrat...

A: Length = 6 m number of vibrations in 10 seconds = 45Number of vibrations in 1 second = 4.5 Therefore...

Q: The vapor pressure of mercury at 25°C is 1.85 torr. Calculate the vapor pressure in mmHg and atm. Ro...

A: The vapor pressure in mmHg can be obtained as 1.85 torr=1.85torr×1mmHg1torr=1.85mmHg

Q: How long does it take for a ball dropped off of a building of height 7.7 m to hit the ground if the ...

A: When a ball is dropped at the rest from the top of the building than it moves under the constant gra...

Q: If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from slidi...

A: Solution: given that radius r = 80 m theta = 15 degree v2 = 30 km /h=8.33 m/s

Q: A convex mirror has its radius of curvature 20 cm. Find the position of the Image of object placed a...

A: Write the equation for the mirror formula. 1u+1v=2R1v=2R-1u Here, The object distance is "u" in cm T...

Q: QUESTION 2 What are the characteristics of the image formed by a concave mirror, when an object is p...

A: When the object is placed at the center of curvature of a concave mirror, the size of the image form...

Q: The figure below shows a charged particle, with a charge of q = +38.0 nC, that moves a distance of d...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts (a, b, an...

Q: What are the four processes involving expansion and contraction that contribute to rock weathering?

A: Given What are the four processes involving expansion and contraction that contribute to rock weathe...

Q: What current flows through the bulb of a 3.00-V flashlight when its hot resistance is 3.60 Ω?

A: Given Data: Voltage = V = 3 V Resistance = R = 3.60 Ω Current = I = ? We have Ohm's law, ...

Q: (a) What is the efficiency of an out-of-condition professor who does 2.30 ✕ 105 J of useful work whi...

A: Click to see the answer

Q: Calculate the effective resistance of a pocket calculator that has a 1.35-V battery and through whic...

A: Given quantities: potential difference (V) = 1.35 V current flowing (i) = 0.2 mA Let, the effecti...

Q: A 1kg cannon ball is fired horizontally with an initial velocity of 5m/s. If the cannon was atop a w...

A: The horizontal velocity is 5 m/s, The vertical velocity can change since there is no acceleration al...

Q: A car requires 170kiloJoules to accelerate from 23m/s to 28m/s. If this happens over 2seconds, what ...

A: The required work to accelerate the car is, W=170 kJ The time interval to accelerate the car is, t=2...

Q: In an elliptical orbit, the furthest point of the planet from the Sun is called “aphelion”, the clos...

A: Click to see the answer

Q: A physics major is cooking breakfast when he notices that the frictional force between the steel spa...

A: The frictional force between the steel spatula and the frying pan is f = 0.450 N. The coefficient of...

Q: A hydrogen atom is in a state with energy -1.51 eV. Using the Bohr model: (a) Calculate the angular ...

A: Click to see the answer

Q: Which graph best represents the relationship between the magnitude of the gravitational force that o...

A: The expression represents the relationship between the magnitude of the gravitational force that one...

Q: A projectile is fired from an angle of 35degrees above the horizontal with a speed of 180m/s. Calcul...

A: In projectile motion maximum height is given by, hmax=u2sin2θ2g Time of flight of projectile motion...

Q: A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 26...

A: radius of plat curve r1=150m r2=80.5m speed of truck when radius at 150m is v1=26.5m/s at radius 80...

Q: The neutron has a mass of 1.67 ✕ 10−27 kg. Consider a neutron moving with a speed of 0.960c. (Enter ...

A: Given: rest mass of neutron mo= 1.67 *10-27 kg speed v=0.960 c

Q: Describe the given diagram and identify each dot whether the potential energy diagram is in stable, ...

A: Fig-1 , shows the variation of potential energy ,U, of a particle ,in one dimension, as function of ...

Q: A person with body resistance between his hands of 10.0 k Ω accidentally grasps the terminals of a 2...

A: a. the circuit diagram to represent the situation is shown below.

Q: A granite ball of radius 3.00 m and emissivity 0.048 is heated to 120°C. (c) If the ambient temperat...

A: Click to see the answer

Q: A 50.0 g mass is attached to a horizontal spring with a spring constant of 15.0 N/m and released fro...

A: mass = 50 g K (spring constant) = 15 N/m initial speed = 0 m/s Amplitude = 30 cm = 0.3 m/s total en...

Q: A light ray enters an ice, at 0∘C, and is refracted at an angle of 52∘. If it is initially traveling...

A: Angle of refraction, r=52° Refractive index of ice nice =1.31 Refractive index of water nwater=1.33 ...

Q: A rock with a mass of 575 g in air is found to have an apparent mass of 347 g when submerged in wate...

A: At equilibrium, the net force on the rock in the vertical direction must be zero. Take the upward di...

Q: Let's begin with a simple calculation of the weight of air using density. Find the mass of air and i...

A: Given data The length of the room is l = 4.4 m. The width of the room is w = 6.1 m. The height of ...

Q: A particle r = (2t3 + 3t) i + (4 - 5t2) j - t4 k given time-dependent positionIt moves with the vect...

A: Solution: As given that r = (2t3 + 3t) i + (4 - 5t2) j - t4 k

Q: A multipurpose transformer has a secondary coil with several points at which a voltage can be extrac...

A: Given:- A multipurpose transformer has a secondary coil with several points at which a ...

Q: A large wrecking ball is held in place by two light steel cables. If the massm of the wrecking ball ...

A: Click to see the answer

Q: a) Use voltage division to determine the voltage v, across the 40 N resistor in the circuit shown. 3...

A: To determine: Voltage v0 Current through 40 Ω and 30 Ω resistor. Power absorbed by 50 Ω resistor.

Q: What will happen to the mirror when you put it in a glass of water? Does it look straight? why does ...

A: When we put mirror in glass of water refraction of light happens . It does not look straight as ligh...

Q: The typical pressure of carbon dioxide in an unopened soda can is 350. kPa. Calculate the typical pr...

A: Click to see the answer

Q: A Styrofoam box has a surface area of 0.88 m2 and a wall thickness of 2.0 cm. The temperature of the...

A: The latent heat of fusion for ice is (Lf) = 3.33*105 J/kg The thick ness of the wall (l) = 2*10-2 m ...

Q: At a distance of 13m from the point source the intensity is 80 dBm. At what distance from the source...

A: Intensity α1distance2 (given) I1 =80 dBr1=13 mI2 =40 dB Intensity due to point source varies with di...

Q: A cup of coffee has a mass of 0.377 kg. If you place this cup of coffee on a desk and let is sit the...

A: mass of cup of coffee = 0.377 kg acceleration due to gravity (g) = 9.8 m/s2 To find : force exerte...

Q: Consider the three objects shown in water. The wood floats while the aluminum and the steel sink. Th...

A: Given:Consider the three objects shown in water. The wood floats while the aluminum and the steel si...