Answered: A block slides down a frictionless…

A block slides down a frictionless plane that makes an angle 30° with the horizontal. The magnitude of the acceleration in m/s² of the block is

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 12PE: (a) Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance...

See similar textbooks

Related questions

Q: Resonance Three planets have a resonance of 1:3:5. If the closest planet to the star has an orbital…

A: In the celestial mechanics, whenever two bodies are in the orbital resonance, their orbital periods…

Q: Find the direction of the induced current in each loop shown below ((a) and (b)). In (a) the bar…

A: According to Lenz's law, an electric current induced by a changing magnetic field flows in a…

Q: A point on the surface of a solid sphere (radius = 0.954 m) is attached directly to a pivot on the…

A: Solution

Q: Standing on the roof of a 95-m tall building, a girl holds her hand past the edge and throws a ball…

Q: Consider the two vectors, A and B. in the figure. The resultant vector C is the sum of vectors A and…

Q: A proton is placed in an electric field of intensity 700 N/C. What are the magnitude and direction…

A: Given data: Electric field (E) = 700 N/C Mass of proton (m) = 1.67×10-27 kg e = 1.60×10-19 C…

Q: A steel plug has a diameter of 9.000 cm at 30 °C. At what temperature will it fit exactly into a…

Q: An old campfire is uncovered during an archaeological dig. Its charcoal is found to contain less…

A: The given data we have: Sample left: 1/200 of the normal amount Half life of the sample: 5730 years.…

Q: A rod carrying a total charge 14.7 µC uniformly distributed along its length 8.5 m (constant λ) and…

Q: 17) The moment of Inertia of a solid uniform sphere of mass m and radius R is given by the equation…

Q: 15) An object of mass 0.5 kg., moving in a circular path of radius 0.25 m, experiences a centripetal…

A: Since you have asked multiple questions, the first one is answered here, please repost the remaining…

Q: 2. A free particle is described by the wave function V(x, t) = A exp [i ((2.16 × 10¹² m¯¹)x − (3.45…

Q: Suppose you have a cylindrical wire of radius a, where a parallel-plate capacitor is being charged.…

Q: A beam of white light is incident at 34 degrees to the surface normal of a stagnant lake. When the…

A: The refractive index of material is inversely proportional to the wavelength. Means the sorter the…

Q: Have you ever chewed on a wintergreen mint in front of a mirror in the dark? If you have, you may…

A: Given Data, Emitted frequency of photon ν=8.88×1014 Hz

Q: none of 24. A sphere has a radius of 1.40 m, and an emissivity of 0.70. It's radiating 40,000…

Q: The graph in the figure shows the variation of the electric potential V (measured in volts) as a…

A: Given data: The graph between potential and radial direction Required: The value of r for which the…

Q: eign and come back (round-trip). 2. A half wave lantenna has the best reception when its length is…

A: Given value--- length of TV antenna = 40 cm. We have to find--- frequency of signal ?

Q: 10. A diver bounces straight up from a diving board and falls feet first into a pool. She starts…

Q: One kg of H₂O at 0°C (as a liquid) is brought into contact with a heat reservoir at 100°C. When the…

Q: 2. Consider a box 1-meter on a side at standard room conditions containing air composed…

Q: At the interface of two transparent media, a light ray experiences both refraction and reflection.…

A: Given data: The light ray experiences both refraction and reflection Required: The angle of…

Q: The figure below shows a collision between three balls of clay. The three collide simultaneously and…

Q: 6) A mass of 3 kg is attached to a massless spring with a force constant 500 N/m. The mass rests on…

Q: 32. A cannon fires projectiles over level ground at 140 m/s. What is the smallest ar the ground at…

A: GivenInitial velocity, u=140 m/sHorizontal range, R=1500 m

Q: A 68.3-kg circus performer is fired from a cannon that is elevated at an angle of 52.6° above the…

Q: 19. List the quantum numbers of all states in the 4d subshell of hydrogen in the (n, l, me, m.)…

Q: Phrancine, who has a mass of 20 kg and is sitting on a giant skateboard coasting towards Phrank at a…

Q: Learning Goal: To understand the Bohr model of the hydrogen atom. n 1913 Niels Bohr formulated a…

A: Write the expression for the centripetal force. Fc=mv2r Write the expression for the electrostatic…

Q: A uniform rod of mass 500. g is used as a balance. We want to balance a 2.00-kg weight on the left…

Q: The half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. s -1…

A: Given data: The half life of randon-222 is t1/2=3.823 days=330307.2 s Part a: The expression for…

Q: A 3500 kg statue is placed on top of a cylindrical object (Y= 2.3 x10^10 Pa). The stand has a cross…

Q: 15. An object of mass m = 6.0 kg is rotating in a circular path in a vertical plane at the end of a…

Q: In the circuit shown in the figure, both switches are initially open. we close the switch S₁, and we…

A: Given is a circuit in which both switches are initially open. As soon as we close switch S1, we…

Q: Two stationary, positive, point charges that are originally separated by a distance of 6.00 cm…

A: Given data: Two positive charges Original Distance (r) = 6.00 cm Original force (F) = 8.00 μN New…

Q: When can we be certain that the average velocity of an object is always equal to its instantaneous…

A: Given data: The average velocity is equals to the instantaneous velocity Required: The condition…

Q: In the Fig. below, two 6.20 kg blocks are connected by a massless string over a pulley of radius…

Q: Use the principle of equilibrium (where the sum of torques is zero) to calculate the third, unknown…

A: The principle of equilibrium suggests that the net torque about fulcrum must be zero. The FBD of the…

Q: Learning Goal: To understand the Bohr model of the hydrogen atom In 1913 Niels Bohr formulated a…

Q: The half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222.…

Q: 7) Can an object have energy without having momentum? Explair An object can have energy without…

A: Yes , an object can have energy without any momentum . The object having zero momentum…

Q: Due to a jaw injury, a patient must wear a strap (see the figure) that produces a net upward force…

A: Given: chin strap angle = 75°Net upward force = 5 N

Q: A jet flies 540 miles per hour. Write its rate in kilometers per minute. (1 mile \approx 1.6 km)

A: Given:- A jet flies with velocity. v = 540 miles /hours Find:- Write its rate in kilometers per…

Q: 22 A particle is confined to the one-dimensional infinite poten tial well of Fig. 39-2. If the…

Q: 1. Suppose identical amounts of heat transfer into different masses of copper and water, causing…

A: Given value--- identical amounts of heat transfer into different masses of copper and water,…

Q: A 0.200-m uniform bar has a mass of 0.676 kg and is released from rest in the vertical position, as…

Q: The position of an object that is oscilaltj g on an ideal spring is given by the equation…

A: Given X =14 cos (1.2t) t=0.85 s

Q: QUESTION 9. You have an object of 3 cm at a distance of 5 cm in front of a concavel mirror whose…

Q: 3) A 0.1 kg baseball is thrown with a velocity of 35 m/s. The batter hits it straight back with a…

A: Given data: Mass (m) = 0.1 kg Initial velocity (u) = +35 m/s Final velocity (v) = -60 m/s Required:…

Q: Question 4 An fighter aircraft has left the airbase and travels 30 km due south. On the other hand,…

Concept explainers

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.

Question

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

(a) Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a).
1. During a severe storm in Palm Beach, FL, on January 2, 1999, 31 inches of rain fell in a period of nine hours. Assuming that the raindrops hit the ground with a speed of 10 m/s, estimate the average upward force exerted by one square meter of ground to stop the falling raindrops during the storm. (Note: One cubic meter of water has a mass of 1000 kg.)Explain and lable.
A 150-g baseball is dropped from a tree 15.0 m above the ground. a.)With what speed would it hit the ground if air resistance could be ignored? Express your answer to three significant figures and include the appropriate units. b.)If it actually hits the ground with a speed of 8.00 m/s, what is the magnitude of the average force of air resistance exerted on it? Express your answer to three significant figures and include the appropriate units.
Question 5: a. (i) Give an example of an object that has three forces acting on it, and (1) accelerates, (2) moves atconstant (nonzero) velocity, and (3) remains at rest. (ii) In terms of work done distinguish betweenconservative and non-conservative force.b. The drawing shows a sulfur dioxide molecule, SO2. It consists of two oxygen atoms and a sulfuratom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the dataprovided in the drawing, find the center of mass of the sulfur dioxide molecule. Express youranswers in nanometers (1 nm = 10_9 m).
EXCEL Spring Problem: An experiment is conducted to determine the value of a spring constant. Objects of varied mass are suspended from the spring and the spring deflections are measured. The results are as follows: Mass, m (kg) Deflection, x (mm) 5.3 15 7.1 22 10.2 31 12 38 15.4 45 Use EXCEL to determine the spring constant, k, in N/m.
Keep the track tilted at 13∘∘ with the horizontal. Put the friction block on the track surface at the top of the track. Let the friction block slide downwards. The length of the track is 74 cm. Starting from zero speed at the top of the track, what will be the speed of the friction block as it reaches the bottom? Write your answer in m/s. Use μμk = 0.13 and mass of the friction block = 400 grams.
A learner with a mass of 60kg runs up a flight of stairs in 5 seconds.The height of the stairs is 300cm.a. Is work a vector or scalar quantity?b. Calculate the work done by the learner.
Question 1. I. In the Theorem of Pappus, the center of mass is always located inside the region or area of the figure. II. In addition, the center of mass is always equal to the geometric centroid. a. Both statements are true b. Both statements are false c. Statement I is true, the latter being false d. Statement I is false, the latter being true 2. I. For springs obeying Hooke’s Law, the work required to compress the material by dx distance is always less than the requirement to stretch it by the same dx distance. II. The spring constant is dependent on the amount of force required to stretch it by some x distance. a. Both statements are true b. Both statements are false c. Statement I is true, the latter being false d. Statement I is false, the latter being true 3. I. As two objects move farther away from each other, the force of attraction between them decreases. II. Thus, if the force of attraction decreases with distance, the work shall decrease as well. a. Both…
a. Calculate the force (in N) needed to bring a 1050 kg car to rest from a speed of 80.0 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). b. Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a).
(a) What is the amount of force if a man stands on the top of mountain if he has mass of 86kg? (b) A man is lifting a 1 bag of cement in unknown direction with a magnitude of 10 meters and a height of 7 meters in 26 seconds Calculate the amount of power exerted in the bag.
A 0.160 kg hockey puck starts from rest and reaches a speed of 22 m/s when a hockey stick pushes on it for 1.2 m during a shot. (a) What is the final kinetic energy of the puck? (b) Determine the average net force on the puck using two different methods.
(a) A child slides down a water slide at an amusement park from an initial height h The slide can be considered frictionless because of the water flowing down it. Can the equation for conservation of mechanical energy be used on the child? (b) Is the mass of the child a factor in determining his speed at the bottom of the slide? (c) The child drops straight down rather than following the curved ramp of the slide. In which case will he be traveling faster at ground level? (d) If friction is present, how would the conservation-ofenergy equation be modified? (e) Find the maximum speed of the child when the slide is frictionless if the initial height of the slide is 12.0 m.