What type of simple machine is a flight of stairs? O pulley wedge inclined plane lever

Q: What is the efficiency of a machine that produces 23 J of work from an input of 55 J? A. 32 %…

A: Given data:  Work done (Wout) = 23 J Input energy (Ein) = 55 J Required: Efficiency of the machine

Q: It takes 18 foot-pounds of work to stretch a spring 4 inches from its natural length. Find the work…

A: The work done to stretch the spring is W=12kΔx2 Here, k is the spring constant, ∆x is the…

Q: Weight (lb) 70 170 Weight (N) 0.18 80 Height of single step (m) Number of steps climbed Total height…

A: The weight in Newton is given by W=170 lb4.4482216153 N1 lb=756 N The total height he climbed is…

Q: machine can multiply forces or A. Distances B. Work C. Energy D. All of the above

A: A simple machine is a device that is used to change the magnitude and direction of the applied…

Q: Calculate the kinetic Energy of a 12 kg bowling ball rolling at 4 m/s

A: Kinetic energy (K.E.) of a moving body is the energy of the body by virtue of its motion is given…

Q: A huge truck from the West weighs 1,000 kg runs at 120kph carrying a load of 1,200 kg on its back.…

A:

Q: An Atwood machine has M1 = 2Kg and M2= 10Kg, the pulley has no mass. Calculate the acceleration of…

A:

Q: Calculate the kinetic energy of a 2.5 x 10 kg airplane moving at a speed of 202. Round your answer…

A: In the given question, Mass of the airplane (m) = 2.5×104kg Speed of the airplane (v) = 202m/s We…

Q: How is force related to power? Power times force is velocity. Force divided by…

A: Required: The relationship between force and power

Q: In comparison to a gradual ramp, a steeper ramp results in:  1) work to be done to get to the top…

A: Let in both situation person climb up to h height from the ground slowly.  Then work done,…

Q: A force of 3 pounds stretches a spring 1 inch from its natural position. Find the work (in in-lb)…

A: Given: Force applied on spring = 3 Pounds stretch in spring = 1 inch

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: An object is pulled 10 feet across a floor using a force of 85 pounds. The direction of the force is…

A: force vector can be expressed as F→=85 lbcos60°i^+sin60°j^

Q: A farmer attaches a tractor to a sled loaded with firewood using a chain at an angle of 26.8˚ as…

A: Answer  work done is W=122.3 KJ

Q: A machine raises a load of 410 N through a height of 12 m in 2 sec. Calculate: 1. Energy spent by…

A:

Q: Jennifer watched as movers used a ramp to load a heavy dresser into a moving truck. The dresser,…

A: height lifted = 1.5 m distance moved along the ramp (d)= 6.6 m

Q: A constant 7.8-N force pushes a small ball in the direction of the force over a distance of 3.8 m.

A:

Q: A truck driver pushes the truck with a 50 N horizontal force. He is unable to move the truck. The…

A: Given Data: The force applied is, F = 50 N. The displacement, s = 0.

Q: The power output of the motor of a crane is 2000W. With what speed can the machine lift a 1000kg…

A:

Q: Choose the BEST answer to the following: A model car with 3 times as much speed as another has a…

A: Write the expression for kinetic energy.

Q: Two blocks are connected by a massless rope as shown below. The mass of the block on the table is…

A:

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: An object of mass 8 kg falls form the top of a building 84 m high. What is its kinetic energy (in…

A: Given: The mass of an object is m=8 kg. The initial height of building is h1=84 m. The final height…

Q: Which statement best describes how power and work are related? A. Power is a measure of how quickly…

A: Work: It can be defined as, how much force it takes to move an object in the direction of a force.…

Q: if the book falls off the shelf, what will be its speed when it hits the ground.

A:

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: An old forklift is replaced with a new one. The new forklift has 2x the power of the old one. How…

A: Given: Let the power of the old forklift is P. The new forklift has 2 times the power of the old…

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: 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: A machine raises a load of 440 N through a height of 14 m in 2 sec. Calculate: 1. Energy spent by…

A:

Q: Mechanical energy is the sum of

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

Q: In the pulley system shown in the attached picture, the free end of the rope wound around the…

A: Consider the free-body diagram of the pullies as follows.

Q: Match each type of simple machine with its example. 1. wedge a. doorknob b. chisel 2. wheel and axle…

A: 1. Wedge - chisel (both have one thick end and one pointed end) 2. Wheel and axle - Doorknob (same…

Q: kinetic energy

A: 150.  joules

Q: Power: A kilowatt-hour is equivalent to 1000 W. 3600 J 3,600, 000 j/ s . 3, 600, 000 J 3600 j/s

A: Answer:- 3,600,000 J  A kilowatt- hour = 3,600,000 J    Because    1kilowatt - hour = 1 kilowatt × 1…

Q: When does a machine act as (a) a force multiplier , (b) a speed multiplier .

A: Machine acts as a force multiplier when

Q: A machine raises a load of 430 N through a height of 10 m in 5 sec. Calculate: 1. Energy spent by…

A:

Q: A box is moved 10 m across by a floor a force of 20 N acting along the direction of motion. The work…

A: Find the work done by the force.

Q: A crane uses an average force of 5200 N to lift a grinder 25 m how much work does the crane do on…

A:

Q: A farmer attaches a tractor to a sled loaded with firewood using a chain at an angle of 25.7˚ as…

A: Given: Constant Force, F = 3.6 kN Distance or displacement, d = 42.5 m Angle θ = 25.7° To determine…

Q: Choose the BEST answer to the following: A machine cannot multiply (a) forces. (b) distances. (c)…

A: A machine can alter an force, all the machine are subject to conservation of energy principle, no…

Q: An object of mass m= 4kg placed on a frictionless, horizontal table is connected to a string that…

A: Given :- The mass m1 = 4 kg  The mass m2 = 9 kg  The mass arranges in the wavy shown in the figure.…

Q: bicycle and a rider together have a mass of 7.40 slugs if the kinetic energy is 742 foot pounds find…

A: 1 slug = 14.594 kg 1 foot pound = 1.356 J

Q: Jennifer watched as movers used a ramp to load a heavy dresser into a moving truck. The dresser,…

A: Given:- Jennifer watched as movers used a ramp to load a heavy dresser into a moving truck. The…

Q: Which of these is not a simple machine?   A) a pair of scissors B) a lever C) a ramp D) the pulley

A: The machine is a mechanical device in which some form of input is given to get desired output. There…

Q: etermine the mechanical energy, kinetic energy, a

A: We know that the  mechanical energy of a system is generally in terms of potential energy and…