Give two reasons why the efficiency of a single movable pulley is not 100%.

Q: Both a short ramp and a long ramp reach a height 1 m. Which ramp has a greater mechanical advantage?

A: Mechanical Advantage (MA) = ( Input Distance) / (Output Distance)

Q: the mechanical advantage of the lever.

A: Given data;  Distance=30 cmOther end distance=90 cm from the load Find the following point a,b, and…

Q: A rope pulley system with 3 pulleys in the top and 2 in the bottom is required to lift a load. If…

A: Calculate the useful effort.

Q: Name the pulley which has no gain in mechanical advantage. Explain, why is such a pulley then used?

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Q: How much power is provided by a motor if it does 27 J of work in 3.0 seconds?

A: Work = W = 27 J Time = t = 3 s Power is defined as the work done per unit time. The mathematical…

Q: In the figure shown below, the value of co- efficient of dynamic friction between 500 N block and…

A: Draw the free-body diagram of the 100 N block.

Q: Cite an example in which a simple machine makes your work easier and faster.

A: In this question we have to give an example of a simple machine. Please give positive feedback if…

Q: How much work is needed to accomplish a certain task 4x longer if the power is still the same?

A: In this question we have to answer how much work is needed to accomplish a certain task 4 times…

Q: Suppose you used an ideal pulley of the type shown in image (e) in the figure below to support a car…

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Q: In a single fixed pulley, if the effort moves by distance x downwards, by what height is the laod…

A:

Q: How is the mechanical advantage related to the velocity ratio for (i) an ideal machine (ii) a…

A: The relation between mechanical advantage and velocity ratio is

Q: Power of the machine if it is 100% efficient.

A: Given data; Load raises by machine,F= 720 NHeight raises the load,h=12 m time,t= 5 secCalculate;…

Q: To reduce the power needed to run an appliance by 1/3, how much work is needed if the time taken to…

A:

Q: If an input of 100 J in a pulley system increases the potential energy of a load by 60 J, what is…

A: Given that Input energy = 100 J Output energy = 60 J

Q: Assume that you are riding a bicycle. An applied force of 701 N downward is applied as you push on…

A: MA = Fo/Fi

Q: Give reason why in a single fixed pulley, the velocity is always more than the mechanical advantage.

A: The expression for the velocity ratio,

Q: The mechanical advantage of a simple machine is always eq

A: Hi , the correct is False . Reason is given below

Q: A fisherman is about to reel in a 9-lb fish located 15 ft directly below him. If the fishing line…

A: Given, Weight of fish, w1=9 lb, height, h= 15 ft, and weight of line, wl=1 oz/ft=1516lb=0.94 lb.

Q: If an input force of 202 N is applied to the handles of the wheelbarrow with a mechanical advantage…

A: The input force applied to the handles is, The mechanical advantage of the wheelbarrow is,

Q: A machine does 230 J of work in 30 seconds. Find the power of the machine?

A: Introduction :  In this question we are provided it value of work and time . With these data we have…

Q: The total mechanical energy of the block is the sum of kinetic and potential energies.

A:

Q: Using a lever, Joe is able to lift a 10,000 N car off the ground with a force of 1,000 N. What is…

A: Weight of car= 10000 N Force applied by Joe We know that mechanical advantage(M.A)= output force/…

Q: The lever is a compound machine. True False

A: The lever consisting of a beam or rigid body pivoted at a fixed hinge. A lever is a rigid body…

Q: For the lever shown in the figure below find the effort that can lift the load. (Use: g = 9.8 m/s)…

A: Torque is defined as Γ→=r→×F→=rFsinθ Here r is the distance, F is force and θ is the angle between r…

Q: Sergei uses a lever to lift a heavy rock. He obtains a 2.5 m lever and places the fulcrum 0.7 m from…

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Q: total mechanical energy

A:

Q: Using a simple machine, a student is able to lift a 500N weight by applying only 100N. What is the…

A: The correct option is  5

Q: the force exerted by a machine is called the ____ A. effort force B. resistance force C.…

A: Please see the answer in step 2.

Q: What is the efficiency of the machine that miraculously converts all the input energy to useful…

A: GivenInput energy = Output useful energy

Q: Why is it important to reduce friction on compound machines?

A: The friction force is the force which opposes the relative motion between the two bodies.

Q: The total length of a first class lever is 9.0 ft. This is used to move a load of 390 lbs, as…

A: givenTotal length of first class lever=9 ftload=390 lbs

Q: What is the total mechanical energy

A: Since there is no friction Total energy will conserved Total energy at A = Total energy at B

Q: Unit of work?

A: Work: It is the product of the applied force to the displacement of the object along the direction…

Q: A bicycle is a compound machine using levers and gears. (a) True (b) False

A: Levers and Gears are simple machines on their own. However, bicycle is a compound machine that is…

Q: What type of simple machine is an axe?   A) Lever B) Wedge C) Both A & B D) The screw

A: 1. A lever is a simple machine which consists of a rigid rod pivoted at a fulcrum. 2. Wedge is a…

Q: In an input of 100J in a pulley system increases the potential energy of a load by 60J , what is the…

A: Given:Input energy = 100 JOutput energy = 60 J

Q: The mechanical advantage of a simple machine is always equal to its ideal mechanical advantage. O…

A: Actual Mechanical Advantage=FoutFin Ideal Mechanical Advantage =sInsout Explanation: The Actual…

Q: What is the ideal mechanical advantage of a ramp that is 4.3 m tall and 27 m long? A 1.5 6.3 22.7…

A:

Q: Which is not a simple machine? O pulley ramp O bicycle wood screW

A: Pulley, Ramp and Wood Screw are all simple machines. Often, they are single piece components.…

Q: Mechanical energy is the sum of

A: Required : Mechanical energy is the sum of..

Q: Give reason why the efficiency of a movable pulley is always less than 100%.

A: For a pulley,

Q: What is the formula to calculate the mechanical advantage of a lever?

A: Mechanical advantage  Its ratio of the input force to the output force. MA = input arm distance…

Q: Using an inclined plane with an IMA of 6, you push a box up the ramp and measure the amount of force…

A: Answer :   Efficiency (€) define as ratio of experimental determined advantage (AMA) to ideal…

Q: An effort of 100 N is required to lift a load of 2500 N by the first system of pulleys which has 5…

A: Given data: The effort is F=100 N. The load required to lift is W=2500 N. The number of pulleys is…

Q: If a machine multiplies force by a factor of 4, what other quantity is diminished, and by how much?

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Q: If a machine exerts a force of 250 n of an object and no work is done what must have occurred

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Q: A machine does 185 J of work in 20 seconds. Find the power of the machine?

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Q: work is done by the boy

A: