21. Korra is trying to save her dear friend Bolin from sliding down the side of a mountain and into the abyss. Bolin is unconscious in a cart, sliding down the side of a mountain toward the edge. The angle of the slope on the mountain is 39 degrees above the horizontal. Korra is too far away to do anything but airbend a gust of wind to push on Bolin's cart to slow him down (If you haven't seen this show, simply treat this as Korra pushing the cart up the slope of the mountain parallel to the inclined surface Bolin is sliding on). The cart has a mass of 40kg, and Bolin has a mass of 60kg. The coefficient of friction between the cart and the mountain is 0.33. The cart has 19m before it reaches the edge of the cliff, and has 14,450 J of kinetic energy at the top of the hill. Using a gravity value of 10 m/s^2, how much force does Korra need to push on Bolin's cart to get it to stop before falling off the cliff?

21. Korra is trying to save her dear friend Bolin from sliding down the side of a mountain and into the abyss. Bolin is unconscious in a cart, sliding down the side of a mountain toward the edge. The angle of the slope on the mountain is 39 degrees above the horizontal. Korra is too far away to do anything but airbend a gust of wind to push on Bolin's cart to slow him down (If you haven't seen this show, simply treat this as Korra pushing the cart up the slope of the mountain parallel to the inclined surface Bolin is sliding on). The cart has a mass of 40kg, and Bolin has a mass of 60kg. The coefficient of friction between the cart and the mountain is 0.33. The cart has 19m before it reaches the edge of the cliff, and has 14,450 J of kinetic energy at the top of the hill. Using a gravity value of 10 m/s^2, how much force does Korra need to push on Bolin's cart to get it to stop before falling off the cliff?

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 hockey puck slides with constant velocity, from point “a” to point “b” along a frictionless horizontal surface. When the puck reaches point “b”, it receives a instantaneous horizontal “kick “ in the direction as depicted by the heavy arrow.a. (a)b. (b)c. (c)d. (d)3. (e)
Choose the correct answer choice.
You throw a ball on planet X where g is not the same as on Earth. The figure below shows the vertical velocity of the ball after it leaves your hand. Air resistance is not important. v(m/s) 18.0 12.0 6.0 -6.0 -12.0 -18.0 1.0 2.0 3.0 t(s)
A ball is falling through air. Calculate the terminal speed (a positive number, in m/s) if these are the parameters: m = 3 kg b = 1 N/(m/s) g = 10 m/s2
The Zero Gravity Research Facility (for more information you can check out their homepage at the URLhttp://zeta.lerc.nasa.gov/facility/zero.htm). At the Zero Gravity Research Facility at NASA Lewis Research Center the main facility is a tower which allows to drop something from a height of 145m. a) How long can an object be in free fall if it starts falling from the top? b) What is its speed just as it reaches the catching device at the bottom? c) When caught, the object experiences an average deceleration of 25g as its speed is reduced to zero.
7. Sally is driving at a constant speed of 25 m/s on a straight horizontal road. She sees an obstacle on the road ahead and applies the brakes! The wheels lock causing the car to slide forward. If the coefficient of kinetic friction between the tires and the road is 0.40, how long does it take the car to come to a complete stop?
You need to cross a river but you don't care where you land on the other side. Question 2 options: You will cross faster if you swim into the current so you do not drift. the fastest way across is to swim at an angle to the current You cannot change the rate you cross the river by swimming in any direction the fastest way to cross is to point straight across the river
the rocket in a rocket powered airplane generates a steady force of 10,000 N in the foward direction and the plane moves horizontally at a constant velocity of 100 m/s through the air. The rocket engine is upgraded so that it now provides a foward force of 90,000 N. what is the new constant velocity of the plane> You cannot neglect air resistance in this question. 200 m/s 300m/s 400 m/s 600 m/s 900 m/s
A nurse pushes a cart by exerting a force on the handle at a downward angle of 35.0 ∘ below the horizontal. The loaded cart has a mass of 28.0 kg and the force of friction is 60.0 N. What force must the nurse exert to move at a constant velocity? Group of answer choices 73.2 N 49.1 N 38.9 N 28.3 N
3. One object dropped from the top of a tall building, and one second later a second object is dropped. Neglecting air resistance, the distance between the falling objects will a. Be constant b. Decrease c. Increase d. Depend on their weight e. Depend on the speed of the plane. Explain your reasoning:
The Earth pulls downward on a pingpong ball with a force of 1N. If this is the "action" force, what is the "reaction" force? answer choices The ground exerts a force of 1N on the ping pong ball The ping pong ball exerts a force of 1 N on the Earth The ping pong ball pushes down on the earth with a force of 1N The is no reaction force when a gravitational force is involved
The Earth pulls downward on a pingpong ball with a force of 1N. If this is the "action" force, what is the "reaction" force? answer choices The ground exerts a force of 1N on the ping pong ball The ping pong ball exerts a force of 1 N on the Earth The ping pong ball pushes down on the earth with a force of 1N The is no reaction force when a gravitational force is involved