You walk into an elevator, step onto a scale, and push the "down" button to go directly from the tenth floor to the first floor. You also recall that your normal weight is ww = 635 NN. What does the scale read after the elevator reaches it final constant speed as it heads to the bottom floor? Express your answer in newtons

Q: A 80.0-kg skier starts down a 100-m high, 15.0° slope on regular skis. The coefficients of friction…

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Q: book (m = 3.50 kg) is at rest on a table. Maria pushes down on the book with a 10.0 N force. If the…

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Q: Zach, whose mass is 77 kg, is in an elevator descending at 12 m/s. The elevator takes 3.2 s to brake…

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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: We start with some review problems A crate of mass 27.1 kg rests on a level surface, with a…

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Q: ation! A motor is used to pull a crate horizontally across the ground at a constant speed of 1.7 m/s…

A: Given, the crate moves with constant velocity, so:& So, net force = 0 N and this is a necessary…

Q: A 5.7 kg block is placed on a 57 degree incline. The coefficient of kinetic friction between the…

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

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Q: We start with some review problems A crate of mass 38.7 kg rests on a level surface, with a…

A: Draw the free-body diagram of the crate.

Q: We start with some review problems A crate of mass 27.1 kg rests on a level surface, with a…

A: Given Data : The mass of the crate is given as m = 27.1 Kg. The force applied to the crate is given…

Q: A wet bar of soap slides down a ramp 10.0 m long inclined at 11.73°. What would be its acceleration?…

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Q: A compressed spring of k = 60 N/m is released from rest on a frictionless surface. What is the…

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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 60 kg person stands on a bathroom scale in an elevator. What does the scale read when the elevator…

A: Given:-  The mass of the object is m = 60 kg. it is on the elevator  Find:-  a) what does the scale…

Q: A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a…

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Q: A person whose weight is 508 N is being pulled up vertically by a rope from the bottom of a cave…

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Q: The following information pertains to questions 1, 2, and 3. A workman pulls a sled across an…

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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: A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 30° angle. The block’s…

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

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Q: A block is sent up an incline with a velocity of 3.51 m/s. Assume there is no friction between the…

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Q: We start with some review problems A crate of mass 20.0 kg rests on a level surface, with a…

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Q: Two horizontal forces, P and Q, are acting on a block that is placed on a table. We know that P =…

A: Given: The mass of the object is 5.1 kg. P→=-2.1i^+4.25k^ N The velocity of the object is constant.

Q: Sam (75 kg) takes off (from rest) up a 50-m-high, 10° frictionless slope on his jet-powered skis.…

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Q: You hit a golf ball into the air with an initial horizontal speed of 20 m/s and an initial vertical…

A: Here given a golf is hit horizontally with a speed 20 m/sec and vetically with a speed 48m/s. We…

Q: At the grocery store you place a pumpkin with a mass of 10.5 lb on the produce spring scale. The…

A: Mass of the pumpkin is m=10.5 lb. Gravitational acceleration is a=32.2 ft/s2. When F1=4.7 lbf…

Q: A 250 gram block on a 30 deg inclined plane is attached by an inextensible string going over a…

A: Given data: Mass of the block, m=250 gm=250×10-3 kg Inclined angle, θ=30° Hanging weight, M=500…

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!