Physics of Everyday Phenomena
9th Edition
ISBN: 9781260048469
Author: Griffith
Publisher: MCG
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Chapter 6, Problem 10CQ
A crate on rollers is pushed up an inclined plane into a truck. The pushing force required is less than half the force that would be needed to lift the crate straight up into the truck. Does the inclined plane serve as a simple machine in this situation? Explain.
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The crane is supported by a pin at point A and a roller at point B. A winch at point C is used to raise and lower loads. The
pulleys all have 350 mm radius, and cable segment ED is horizontal. Take the value of P to be 11 kN.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
2m-2m2m2m-
350
mm
2 m
F
E
D
10
2 m
20°
2 m
B
Determine the support reactions if 0 = 0°. (Round the final answers to four decimal places.) (Do not include a minus sign in your
response.)
The horizontal component of the reaction at A is
KN →.
The vertical component of the reaction at A is
The vertical component of the reaction at B is
KN ↓.
| KN ↑.
What is her useful power output (in W) if she does 30 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.) ? W
A farmer is trying to bring down a couple of bags of cattle feed (mass 70kg) from the 2nd floor (height 2.5m) to the bottom. To do this, he will use a disc pulley to lower the bags down. On one end, a counterweight (mass 55kg) is utilized. The counterweight will start on the ground with the rope attached. When the cattle feed bags are pushed off the edge of the 2nd floor, they will fall down, and the counterweight will be raised up.
Additional Givens:Radius of the disc pulley: 0.75m Mass of the disc pulley: 4kg Acceleration of gravity: 10 m/s^2
Question: How fast will the bags of cattle feed be falling the instant before they hit the ground?
Chapter 6 Solutions
Physics of Everyday Phenomena
Ch. 6 - Equal forces are used to move blocks A and B...Ch. 6 - A man pushes very hard for several seconds upon a...Ch. 6 - Prob. 3CQCh. 6 - In the situation pictured in question 3, if there...Ch. 6 - In the situation pictured in question 3, does the...Ch. 6 - A ball is being twirled in a circle at the end of...Ch. 6 - A man slides across a wooden floor. What forces...Ch. 6 - A woman uses a pulley arrangement to lift a heavy...Ch. 6 - A lever is used to lift a rock, as shown in the...Ch. 6 - A crate on rollers is pushed up an inclined plane...
Ch. 6 - A boy pushes his friend across a skating rink....Ch. 6 - A child pulls a block across the floor with force...Ch. 6 - If there is just one force acting on an object,...Ch. 6 - Prob. 14CQCh. 6 - A box is moved from the floor up to a tabletop but...Ch. 6 - Prob. 16CQCh. 6 - Is it possible for a system to have energy if...Ch. 6 - Prob. 18CQCh. 6 - Which has the greater potential energy: a ball...Ch. 6 - Prob. 20CQCh. 6 - Suppose the physics instructor pictured in figure...Ch. 6 - A pendulum is pulled back from its equilibrium...Ch. 6 - For the pendulum in question 22when the pendulum...Ch. 6 - Is the total mechanical energy conserved in the...Ch. 6 - Prob. 25CQCh. 6 - Prob. 26CQCh. 6 - Prob. 27CQCh. 6 - Prob. 28CQCh. 6 - Prob. 29CQCh. 6 - If one pole-vaulter can run faster than another,...Ch. 6 - Prob. 31CQCh. 6 - Suppose that the mass in question 31 is halfway...Ch. 6 - A spring gun is loaded with a rubber dart. The gun...Ch. 6 - Prob. 34CQCh. 6 - A sled is given a push at the top of a hill. Is it...Ch. 6 - Prob. 36CQCh. 6 - Prob. 37CQCh. 6 - A horizontally directed force of 40 N is used to...Ch. 6 - A woman does 210 J of work to move a table 1.4 m...Ch. 6 - A force of 80 N used to push a chair across a room...Ch. 6 - Prob. 4ECh. 6 - Prob. 5ECh. 6 - Prob. 6ECh. 6 - Prob. 7ECh. 6 - Prob. 8ECh. 6 - A leaf spring in an off-road truck with a spring...Ch. 6 - To stretch a spring a distance of 0.30 m from the...Ch. 6 - Prob. 11ECh. 6 - Prob. 12ECh. 6 - A 0.40-kg mass attached to a spring is pulled back...Ch. 6 - Prob. 14ECh. 6 - A roller-coaster car has a potential energy of...Ch. 6 - A roller-coaster car with a mass of 900 kg starts...Ch. 6 - A 300-g mass lying on a frictionless table is...Ch. 6 - The time required for one complete cycle of a mass...Ch. 6 - The frequency of oscillation of a pendulum is 16...Ch. 6 - Prob. 1SPCh. 6 - As described in example box 6.2, a 120-kg crate is...Ch. 6 - Prob. 3SPCh. 6 - Suppose that a 300-g mass (0.30 kg) is oscillating...Ch. 6 - A sled and rider with a total mass of 50 kg are...Ch. 6 - Suppose you wish to compare the work done by...
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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
- Review. The mass of a car is 1 500 kg. The shape of the cars body is such that its aerodynamic drag coefficient is D = 0.330 and its frontal area is 2.50 m2. Assuming the drag force is proportional to 2 and ignoring other sources of friction, calculate the power required to maintain a speed of 100 km/h as the car climbs a long hill sloping at 3.20.arrow_forwardA farmer is trying to bring down a couple of bags of cattle feed (mass 70kg) from the 2nd floor (height 2.5m) to the bottom. To do this, he will use a disc pulley to lower the bags down. On one end, a counterweight (mass 55kg) is utilized. The counterweight will start on the ground with the rope attached. When the cattle feed bags are pushed off the edge of the 2nd floor, they will fall down, and the counterweight will be raised up. Additional Givens: Radius of the disc pulley: 0.75m Mass of the disc pulley: 4kg Acceleration of gravity: 10 m/s^2 Question: How fast will the bags of cattle feed be falling the instant before they hit the ground?arrow_forwardA cart rolls down a frictionless track and enters a half -circular section at the bottom . If the normal force acting on the cart at position A (the bottom of the half -circle ) is 5 times the cart's weight , what is the maximum height of the cart at position B ?arrow_forward
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