You've always wondered about the acceleration of the elevators in the 101 story high Empire State Building. One day, while visiting New York, you take your bathroom scale into the elevator and stand on it. The scale reads 189 lblb as the door closes. As the elevator moves upward the scale reading varies between a minimum value of 150 lblb and a maximum value of 239 lblb . What is the magnitude of the acceleration as the elevator starts upward? What is the magnitude of the acceleration as the elevator brakes to a stop?

Q: A physics student, in a stationary elevator, places a 250.0 g mass on an electronic balance. The…

A: Given  mass (m) =250.0 g balance reading (mb)=262.0 g Required acceleration of elevator (a)=?

Q: dragster accelerates from rest down a road of length d = 400.0 m. In the absence of any friction the…

A: The downward force on the dragster along its motion is given by

Q: FR2: A cat climbs up the side of a tree, tilted at a 10 degree angle relative to the vertical (the…

A: Given, The angle by which the tree is tilted, θ=10° mass of the cat, m=5 Kg

Q: A person is bungee jumping and he has to barely touch the water. Using the following variables or…

A: Given that: L= length of the person e=length the bungee cord before it is stretched m= the mass of…

Q: A5.0 kg wooden sled is launched up a 45° snow-covered slope( = 0.06) with an initial speed of 6.0…

A:

Q: What is the magnitude of the average drag force ?drag exerted on the car?

A: work done by non conservative forces = change in total energy work done by drag force = total final…

Q: When a 50-kg person steps on a scale in a moving elevator, the scale reads a steady 490 N. Which one…

A:

Q: A physics student, in a stationary elevator, places a 210.0 g mass on an electronic balance. The…

A: Given, mass of object = 210 g  Time = 0 to 3.0 sec the balance reads 274 grams  Time = 3.0 - 12 sec…

Q: Question 15 A car traveling at 26.4 m/s hits a tree. A passenger in the car, who has a mass of 64.0…

A: Initial velocity (u) = 26.4 msmass (m) = 64 kg distance moved (d) = 56 cm = 0.56 m final velocity…

Q: An object of mass m has these three forces acting on it . F1, F2, and F3 are shown in the figure.…

A:

Q: A stone is thrown straight upward with a speed of 25 m/s. It is caught on its way down at a point 5…

A: The vertical displacement of stone is   y=y_0+v_0t-(1/2)gt^2  5=25t-(1/2)(9.80)t^2 5=25t-4.90t^2 On…

Q: . A man on the edge of a platform 8 ft above the ground throws a ball vertically upwards with an…

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Q: A 75 kg P1020 student standing on a scale in a moving elevator looks down at the scale and notes…

A:

Q: What is the spring constant of a spring that stretches 2 cm when a mass of 0.6 kg is suspended from…

A:

Q: You are standing on a scale in an elevator. While the elevator is at rest, the scale reads 650 N.…

A:

Q: Same

A:

Q: If we simplify the model for a mammal's heart, it pumps about 23 g of blood, accelerating it from 25…

A:

Q: A spring is fixed to a board so that its hanging from it vertically. A 10 kg mass is attached to the…

A: Let spring constant be "K".   On earth, mge=Kxe         .....(1)   on moon, mgm=Kxm        ......(2)…

Q: You are standing on your balcony in an apartment building. You tossed a coin straight upwards at 4…

A:

Q: To throw a baseball, the pitcher winds up, starting the ball from rest. They then accelerate the…

A: Given data:  Initial velocity (u) = 0 m/s Displacement (d) = 3.4 m Final velocity (v) = 46 m/s…

Q: Q1: It is believed that much of the mass of the universe is carried by what is called dark matter,…

A: (Q1) Introduction: Dark matter is an elusive substance that permeates the universe exerts many…

Q: You hang a book bag on a spring scale and place the bag on a platform scale so that the platform…

A: Answer:   The magnitude of the force that exerts on the bag is given as:

Q: A physics student, in a stationary elevator, places a 240.0 g mass on an electronic balance. The…

A: Given: The actual mass of the object is 240 g. The apparent mass of the object is 292 g.

Q: ound.   You are pushing up the ramp with a force of 10N.  Starting from rest, the box uniformly…

A:

Q: Second law of Newton 1. A group of students performed Newton's second law experiment and made a…

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Q: You are in an elevator that is going from the 5th floor to the ground floor. As you are arriving at…

A: The elevator is going down from the 5th floor to the ground floor. The force diagram is as shown…

Q: The figure below is for a 7 kg box on a horizontal floor. Initially, you are pushing horizontally on…

A:

Q: the normal force that you experience

A: Given: Initially elevator is at rest. Velocity of elevator in downward direction is vt=-2t2 j^ m/s…

Q: A Deadly Virus. On your flight out of South America your cargo plane emergency-lands on a deserted…

A: T

Q: A person whose weight is 515 N is being pulled up vertically by a rope from the bottom of a cave…

A: Given: The weight of the person is 515 N. The maximum tension in the rope is 573 N. The depth of the…

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.