object of mass m = 4.75 kg, attached to a spring scale, rests on a frictionless, horizontal surface as in t figure below. The spring scale, attached to the front end of a boxcar, reads zero when the car is at rest. spaccom Ⓡ (a) Determine the acceleration of the car if the spring scale has a constant reading of 17.5 N when the car is in motion. m/s² to the right (b) What constant reading will the spring scale show if the car moves with constant velocity? N (c) Describe the forces on the object as observed y someone in the car. This answer has not been graded yet. (d) Describe the forces on the object as observed by someone at rest outside the car. This answer has not been graded yet

object of mass m = 4.75 kg, attached to a spring scale, rests on a frictionless, horizontal surface as in t figure below. The spring scale, attached to the front end of a boxcar, reads zero when the car is at rest. spaccom Ⓡ (a) Determine the acceleration of the car if the spring scale has a constant reading of 17.5 N when the car is in motion. m/s² to the right (b) What constant reading will the spring scale show if the car moves with constant velocity? N (c) Describe the forces on the object as observed y someone in the car. This answer has not been graded yet. (d) Describe the forces on the object as observed by someone at rest outside the car. This answer has not been graded yet

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A 68 kg lady stands on a bathroom scale on elevator. Starting from rest, the elevator accelerates upward, getting its maximu speed of 1.18 m/s in 0.900s. It travels with constant speed for the next 4.00s. Then, the elevator undergoes uniform acceleration in negative y direction for 2 s and comes to rest. What does the bathroom scale register 1) before the elevator starts to go up, 2) during the first 0.900s, 3) while it is traveling at constant speed, 4.) during the time its slowing down?
An Atwood machine consists of two masses hanging from the ends of a rope that passes over a pulley. Assume that the rope and pulley are massless and that there is no friction in the pulley. If the masses have the values ?1=19.5 kg and ?2=12.5 kg, find the magnitude of their acceleration ? and the tension ? in the rope. Use ?=9.81 m/s2.
(optional) A skydiver is weighted 72.7 kg, together with his parachute. The acceleration of gravity is 9.80 m/sec². The air resistance force f to the parachute is proportional to the square of velocity, f = bv², with b = 30.0 Nt sec²/m². Find the expression for his falling speed and the numerical value for his landing speed. When he opens the parachute at t = 0, his falling speed is 10 m/s.
= m = 2 kg boxes move along a conveyer belt at v = 3 m/s. The coefficient of friction between the boxes and the belt is us 0.4. When the emergency shutoff for the conveyer is triggered, it is desirable for the boxes to not slip. Assuming the emergency shutoff decelerates the belt at a constant rate, and all the belts are horizontal, what is the shortest shutoff time to ensure that no boxes slip? t = S Part 2 of 2 What would the minimum shutoff time be if somewhere along the belt there was a downward slope of 20°? t = S
A 9 kg fish hangs from a fishing line. The fish is lowered, such that the tension in the line is 60% of what the tension would be at rest. What is the magnitude of the acceleration of the fish? Answer to 3 sig figs.
At last year's Homecoming Pep Rally, Trudy U. Skool (mass 54.5 kg), attempting to generate a little excitement, slid down a 42.0∘ incline from the sports dome to the courtyard below. The coefficient of friction between Trudy's jeans and the incline was 0.650. Determine Trudy's acceleration along the incline and the time it took her to slide the 6.8 m incline from rest
A 75 kg skier was pushed up a slope of 21.0 degrees west with an inititial velocity of 4.0 m/s. After the inital push, it is not pushed further with the up-slope force. The kinetic coefficient of friction between the skis and the snow is 0.14 and the static coefficient is 0.19. a) What is the acceleration (deceleration) of the skier after the push? b) If his initial velocity was 4.0 m/s, how far up the slope will he move before he stops?
A robot pushes a 20-kg box on the horizontal surface as part of the moving job. The force is 35 N to the left shown, and the box does not move. The coefficients of friction between the floor and box are µs = 0.75 and uk = 0.40. What is the minimum pushing force (magnitude only) needed to move the box, in Newtons? Useg = 10 m/s². Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
6. A skydiver of mass m = 60 kg leaps from a plane with an initial upward velocity of vo = +5 m/s. Assume the diver experiences air resistance proportional and opposite to their velocity, with drag coefficient b= 11 N/(m/s). Also assume acceleration due to gravity is g = 9.8 m/s². The velocity of the diver changes with time, as modelled by the following differential equation. m = -mg-bv dv dt Solve for u(t)= the velocity of the diver at time t, and determine the diver's terminal velocity: lim v(t) t-x
Determine the acceleration of both if m1 = 11.0 kg, m2 = 18.0 kg andθ = 30°. The inclined surface is friction-free. Draw the free body diagrams of each of the masses (pulley is excluded).