If the height of a playground slide is kept constant, will the length of the slide or whether it has bumps make any difference in the final speed of children playing on it? Assume that the slide is slick enough to be considered frictionless. Repeat this question, assuming that the slide is not frictionless.

Q: A solid, horizontal cylinder of mass 14.8 kg and radius 1.00 m rotates with an angular speed of 6.00...

A: (given) Mass of horizontal cylinder = 14.8 kg Radius = 1 m Angular speed = 6 rad/s Mass of putty = 0...

Q: The figure shows an arrangement of four charged particles, with angle e = 40.0 ° and distance d = 1....

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Q: 3- What are the methods of polarization?

A: There are 4 main methods of producing a polarized light through polarization- Polarization through r...

Q: A car accelerates from rest to 90km/h in 10 seconds. What is its acceleration in m/s2

A: Given: The velocity of the car is v=90 km/h. The time is t=10 s.   The velocity of car in m/s is c...

Q: Two pipes of equal length are each open at one end. Each has a fundamental frequency of 480 Hz at 30...

A: Speed of the sound at NTP (v) = 331 m/s Write the equation for the speed of the sound in the pipe. V...

Q: What are wavelength, frequency, time period and amplitude of a sound wave?

A: (a) Wavelength of a sound wave is the distance between two consecutive compressions or two consecuti...

Q: Two trains approach each other, each train traveling at 26 m/s.  The engineer on one train sounds hi...

A: To determine: The frequency of passenger heard on the second train   Given: The speed of source, vs=...

Q: A cubical Gaussian surface surrounds two charges, q1 = +3.3 10-12 C and q2 = -2.0 10-12 C, as the dr...

A: Write the given data with suitable variables. q1=3.3×10-12 Cq2=-2×10-12 C Here, q1 denotes the first...

Q: An electron is placed in a uniform electric field of 17 n N/C directed north created by two horizont...

A: Force on the charged particle placed in the electric field F = q E where, q is the charge and E is t...

Q: An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be?

A: Given : Rating Voltage = 220 V Rating Power = 100 W Finding the resistance by formula : R = V2PSubst...

Q: A semicircle of radius a is in the first and second quadrants, with the center of curvature at point...

A: First taking the right half of the semicircle, The linear charge density can be defined as,

Q: When a sound is reflected from a distant object, an echo is produced. Let the distance between the r...

A: An echo is heard when time interval between the reflected sound and the original sound is at least 0...

Q: Three charges are at the corners of an equilateral triangle, as shown in the tigure belaw. Calculate...

A: Given: q1=2.5 μC, q2=3.5 μC, q3=-4.0 μC, The side of the equilateral triangle is a=0.500 m

Q: The upper half of an inclined plane of inclination 0 is perfectly smooth while lower half is rough. ...

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Q: If a = i + 3j − k, b = 2i + 4j − 2k and c = −i + 2j + 4k, find a number λ such thatd = a + b + λc is...

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Q: The temperature in Browning, Montana was 44℉ on January 23, 1916. The next day, the temperature plum...

A: Required : Temperature change in Celsius.      

Q: Find the magnitude of the horizontal force that would provide acceleration a=2m/s^2 for the blocks (...

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Q: In the given (V –T) diagram, what is the relation between pressures R and P,? V P2 P1 →T (1) P = R (...

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Q: The number of cycles per second of a point in simple harmonic motion is its ________.

A: Given:-            The number of oscillation is the frequency of motion completed in unit time . Its...

Q: A stone falls freely under gravity. It covers distances h, h, and h, in the first 5 seconds, the nex...

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Q: Explain the working and application of a SONAR.

A: The SONAR is an acronym that stands for SOund Navigation And Ranging. The SONAR is a device that uti...

Q: 11. A train initially at rest, has a constant acceleration of 0.5 m/s? a)What is its speed after 15s...

A: Scenario - A train accelerates constantly after starting from rest and to reach up to certain speed....

Q: A researcher observes hydrogen emitting photons of energy 1.89 eV. What are the quantum numbers of t...

A: The energy of n th state in element of atomic number Z is,  En=-13.6 eV×Z2n2 For Hydrogen atom Z=1. ...

Q: A single slit 1.0mm wide is illuminated by 450-nm light. What is the widthof the central maximum (in...

A:

Q: From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m/s. Calcul...

A: Given : Mass of the rifle (m1) = 4 kg Mass of the bullet (m2) = 50 g =  0.05 kg Recoil velocity of t...

Q: Physics Question

A: a) Given That, Mass of the astronaut (m1) = 87 -12 = 75 kg Mass of the Oxy cylinder, (m2) = 12 kg Fo...

Q: Kho Vhid made his own simple pendulum. He hangs it on the ceiling and watch as it moves. He observes...

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Q: A closely wound solenoid of 800 turns and area of cross-section 2.5 × 10–4 m2 carries a current of 3...

A: Number of turns in the solenoid, n = 800 Area of cross-section, A = 2.5×10−4 m2 Current in the solen...

Q: An auditorium measures 40mx20mx12m.the density of air is 1.20kg/m^3. What are a) the volume of the r...

A: The dimensions of the room are given.  Then the volume is calculated as  Volume=Length×breadth×heigh...

Q: What are the limitations of the energy that can be obtained from the ocean?

A: The different forms of energy that can be obtained from the ocean are tidal energy, wave energy and ...

Q: a. 11 m b. t/3 C. tV2 d. tV6 e. 13 m

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Q: A car has two horns, one emitting a frequency of 205 Hz and the other emitting a frequency of 196 Hz...

A:

Q: The horizontal surface on which the objects slide is frictionless. If F= 18.0 N, what is the magnitu...

A:

Q: How do we detect the smell of an incense stick?

A: The particles of hot (after lighting it) incense stick possess large kinetic energy and diffuse in a...

Q: What is difference bw stress and pressure?

A: Following are the points of difference : i) Stress is defined as the amount of force exerted on unit...

Q: The earth may have even reversed the direction of its field several times during its history of 4 to...

A: The Earth’s magnetic field reversal has been recorded several times in the past about 4 to 5 billion...

Q: Making a turn, a plane flies 2 km on a circular path of a radius of 3.6 km. Through what angle does ...

A:

Q: Two horizontal parallel plates are separated by a distance of 183 mm creating an electric field of 1...

A: Given that Distance between plates d = 183 mm Electric field E = 14 μN/C Initial horizontal velocity...

Q: Q5. The lowest energy possible for a certain particle trapped in a certain box is 1.00 cV.(a) What a...

A: E=n2h28mL2E=n2E0Lowest possible energy when n=1.E0=1 eVNext 2 higher levels are,E1=221 eV=4 eVE2=321...

Q: A block of m = 2 kg situated on a rough incline (e = 53") is connected to a light spring having a fo...

A: mass of block = 2 kg θ = 53 degree Spring constant (k) = 100 N m-1Distance moved (d) = 15 cm = 0.15 ...

Q: A gas in a cylinder is held at a constant pressure of 1.75 x 105 Pa and is cooled and compressed fro...

A: (a) Since the pressure is remains constant, the expression for work done is, W=PV2-V1               ...

Q: A science teacher tells her class that their final project requires the students to measure a specif...

A: Given that:

Q: A mass of 0.54 kg is attached to a spring and set into oscillation on a horizontal frictionless surf...

A:

Q: A box with mass 10 kg and a box with mass 15 kg are placed at the left and the right end of a seesaw...

A:

Q: 2) In Figure, mass m, = 1 kg with a velocity v 15 m/s moving in x direction makes elastic collision ...

A:

Q: A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and fina...

A: When a piece of iron is heated in a flame it first becomes dull red then becomes reddish yellow and ...

Q: The volume of a 500 g sealed packet is 350 cm3. Will the packet float or sink in water if the densit...

A: Given : Mass = 500 g Volume = 350 cm3 Density of sealed packet =  1.42 g/cm3 Density of sealed packe...

Q: 4. A certain car has an acceleration of 2.4m/s². Assume that its acceleration remains constant. Star...

A: The first and the second equation of motion is  v =u +  a t s = u t + 0.5 a t2 where, u is the initi...

Q: In a high-speed police chase, a police van is racing after an assassin at a speed of 90 kmph.  The a...

A: Given : Speed of the police van, Vp = 90 km/h = 25 m/s Muzzle speed of the bullet, Vb = 150 m/s Spee...

Q: A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance...

A: Given: Speed of light = 1 unit Time taken = (8 x 60) + 20 = 480 + 20 = 500s  

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.