Suppose you are designing a traditional wooden roller coaster. Which is better: having the biggest hill at the beginning of the ride or at the end? Explain your answer in terms of energy (not thrills).

Q: ... Two objects moving with a speed v travel in opposite direc- tions in a straight line. The…

A:

Q: 1. This container is filled with water (density p= 1000 kg/m³). Atmospheric pressure is Patm =…

A: Given data:  Density (ρ) = 1000 kg/m3 Atmospheric pressure (Patm) = 1.01×105 Pa Depth at point A…

Q: Natalya is in a skydiving tunnel. Her 46.8-kg body experiences an upward force of air resistance of…

A: Given data:  Mass (m) = 46.8 kg Air resistance (Fair) = 521 N, upward Required: The acceleration (a)…

Q: A square wire with 2 m sides is perpendicular to a uniform magnetic field, with half the area of the…

A: Given data, Length L=2 m EMF of battery ε=20 V Magnetic flux B=1.041-0.84t

Q: Light is refracted through unknown material. If the angle of incidence is 62°, and the angle of…

A: Given, angle of incidence , i = 62° angle of refraction , r = 62/2° = 31° index of refraction of air…

Q: The average coefficient of volume expansion for carbon tetrachloride is 5.81 ✕ 10−4 (°C)−1. If a…

A:

Q: The kinetic friction force between a 58.0-kg object and a horizontal surface is 49.0 N.  If the…

A: Given data:  Mass (m) = 58.0 kg Friction force (f) = -49.0 N, opposite to the initial velocity…

Q: e image is inverted parallel but not perpendicular to the mirror surface.   The image is i

A: Plane mirror:- In addition, we already know that the main use of plane mirrors is to observe an…

Q: Take a look at the image below. A zamboni is pulled 9.6 m across a frictionless rink by means of a…

A: Given data:  Displacement (d) = 9.6 m Force (F) = 40 N Work done (W) = 290 J Required: The angle (θ)

Q: A curling stone has a mass of 18.0 kg. The stone begins initially at rest on a flat ice surface. It…

A: Given data:  Mass (m) = 18.0 kg Constant Force (F) = 24.0 N Distance (d) = 4.00 m Required: The…

Q: (a) Find the gravitational potential energy of the astronaut on the surface of the planet. (b) Find…

A:

Q: Airbags are designed to protect you in a crash by increasing the amount of time (At) over which your…

A:

Q: Show the correct FBD, complete solution and BOX your final answer with correct unit. Seatwork 2: Two…

A:

Q: Two students are standing the same distance from a source of sound. The first student receives a…

A: Given that            The power received by first student in thier eardrum:                P1 = 68 ×…

Q: Convert the average mass density in gm/cm-3 of a M = 0.5 Msun  R = 0.015 Rsun white dwarf to the…

A: Given that For white dwarf star given that M = 0.5 Msun  R = 0.015 Rsun We know that mass of sun…

Q: Suppose a proton is moving at 2.5 % of the speed of light. Find the wavelength of the proton in…

A: Mass of proton =1.67×10-27 kg Velocity of light =3×108 m/s velocity of proton =2·5100×3×108 =7.5×106…

Q: An object is 134 cm in front of a concave mirror that has a radius of 80 cm . Part C Calculate the…

A:

Q: question 18    A block of wood has a density of 0.6g/cm^3 and a volume of 1.2cm^3 . What is the mass…

A: Density of wood is  d =  0.6 g/cm3  Volume of the block of wood is V = 1.2 cm3

Q: The velocity of a proton in an accelerator is known to an accuracy of 0.250% of the speed of light.…

A: Mass of proton =1.67×10-27kg Velocity of proton =0·25100×3×108 =7.5×105m/s Momentum =mv…

Q: The drawing shows a force vector that has a magnitude of 134 newtons (N). Find the (a) x, (b) y, and…

A:

Q: A 12-kgkg box is placed on one end of 1.0-mm-long plank. The plank itself also has a mass of 12…

A:

Q: An argon-ion laser produces a cylindrical beam of light whose average power is 0.910 W. How much…

A:

Q: Coherent light from a laser diode is emitted through a rectangular area 2.9 μm x 1.4 μm (horizontal-…

A:

Q: A ball is thrown with an initial upward velocity of 5 m/s. What is its velocity after 1.5 seconds,…

A: Given data:  Initial velocity (u) = +5 m/s Time (t) = 1.5 s Required: The final velocity and it's…

Q: A high-pass RC filter with a crossover frequency of 1000 Hz uses a 120 resistor.

A: frequency, f=1000 Hzresistor, R=120 Ωformula used f=12πRC

Q: Two vehicles A and B are traveling west and south, respectively, toward the same intersection where…

A: .

Q: 0.250-kg stone is attached to an ideal spring and undergoes simple harmonic oscillations with a…

A:

Q: The positions of two masses, ma and mb, are described by the equations: xa(t) = 3A sin (4wt) and…

A: Given:  xa(t) = 3Asin4ωtxbt = 2Asin3ωt

Q: A golf ball is driven at an angle of 45.0 O against the horizontal at an initial velocity of 40.0…

A:

Q: Consider a father pushing a child on a playground merry-go-round. The system has a moment of inertia…

A:

Q: An expensive vacuum system can achieve a pressure as low as 1.00 x 10-9 N/m2 at 19.5 °C. How many…

A: Given:   Pressure, P = 1.00×10-9 Nm2 volume, V = 1 cm3 = 1×10-6 m3 Temperature, T = 19.50 C =…

Q: One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which…

A: The quantities which have both magnitude and direction are called vectors. Examples are velocity,…

Q: How far in meters can a runner running at 3.2 m/s run in the time it takes a rock to fall from rest…

A: Given data: The speed, v=3.2 m/s. The height, h=176.2 m.

Q: (a) An ideal gas occupies a volume of 2.4 cm3 at 20°C and atmospheric pressure. Determine the number…

A: The ideal gas equation is given by: PV=nRT, where P is pressure, V is volume, Tis temperature, and n…

Q: Just like the optical part of the spectrum, radio waves can be described in terms of photons -…

A: Given data:  A radio wave  Frequency (f) = 88.5 MHz = 88.5×106 Hz Required: The energy in Joules and…

Q: A child is pulling a cart massing 2.5 kg forward through a distance of 10 meters at a constant speed…

A: Mass of cart =2.5kg Distance travel = 10m Constant speed of cart =0.55m/s Frictional force =4.9

Q: An electromagnetic wave strikes a 1.26-cm² section of wall perpendicularly. The rms value of the…

A: Given Data:- Area of the section of the wall is A=1.26 cm2   =1.26×10-4 m2 Rms value of the wave's…

Q: A pitcher throws a stone horizontally from the top of a cliff 45 m high. Use g=10 m/s2 How long does…

A: Given data:  A stone is thrown horizontally from the cliff  Height (h) = 45 m g = 10 m/s2,…

Q: How was 3.15 derived as the Vf of the ball in the provided solution.

A:

Q: 4 IN What is the period? 600 What is the frequency? What is the angular frequency? V) J2 1 t, s

A:

Q: A long steel I-beam used in bridge construction has a length of 19.1 m and is made of an element…

A:

Q: An bb gun pellet which has a of mass 20 g is shot horizontally into a foam board with a velocity of…

A: Given data:  Mass (m) = 20 g = 0.020 kg Initial velocity (u) = 60 m/s Final velocity (v) = 0 m/s…

Q: A particle of matter is moving with a kinetic energy of 7.23 eV. Its de Broglie wavelength is 2.87 x…

A: The de Broglie wavelength of a particle of mass m and moving with kinetic energy E is given by,…

Q: 3. Calculate the magnification of an object placed D mm from a compound microscope that has a B/2 mm…

A:

Q: Part A What is the wavelength of a 3.0 MHz ultrasound wave traveling through aluminum? Express your…

A: (A) Given,  Frequency = 3MHz We need to find, Wavelength =?    (B)  Given,  Wavelength same as Part…

Q: The electric field of a plane electromagnetic wave is given by Ex = + 90 sin(k z + 449 t) V/m with…

A: Given:The only non zero component of electric field of an EM wave is Ex = +90 sin(kz+449t)…

Q: An isolated system consists of two objects, A and B, moving without friction along a horizontal…

A: Given,  mA = 2.00 kg mB = 3.00 kg vA = 7.00 m/s vB = 5.00 m/s   By the law of conservation of linear…

Q: A car traveling at 3.2 m/s accelerates at 1.1 m/s2 for 5.5 seconds. How far in meter does it travel?

A: Given data:  Initial velocity (u) = 3.2 m/s Acceleration (a) = 1.1 m/s2 Time (t) = 5.5 s Required:…

Q: concave mirror is constructed so that a man at a distance of 27 cm from the mirror sees his image…

A:

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.