5. A 650 newton bicycle racer climbs a 500-meter hill by doing 400,000 joules of work. a) What are the input and output work done? (Hint: you are given one of these values.) Formula Substitution Answer Input: Output: b) Calculate the efficiency of the bicycle. Formula Substitution Answer

Q: 2) A container of PS5S with a mass of 451kg is loaded onto a Walmart truck using a ramp. The ramp is…

A: Given: Mass of the container, m = 451 kg Length of the ramp, l = 6.12 m Height of the truck bed from…

Q: A 5.0- "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a…

A: Given data: Mass (m) = 5.0 kg Height above the counter (h) = 0.45 m Required: Work done (W)

Q: A motor operates at its rated load of 10hp for 8hrs a day. Its efficiency is 87%. What is the daily…

A: Given: The rated power of the motor is 10 hp. The duration of the run of the motor is 8 hrs. The…

Q: Explain in practical terms why efficiency is defined as W/Qh?

A:

Q: A man exerts a force of 50 N to push a 150 N box up a plane 4.0 m long on to a platform 1.0 m above…

A:

Q: 5) Suppose a bicycle and its rider have a mass of 75kg. The bicycle does 4700 J of work to travel…

A: Given,  Mass of rider and bicycle(m) = 75 kg,  Total work done by bicycle = 4700 j Increase in…

Q: A winch is driven by a 4.0 kW electric motor and is lifting a load of 400 kg to a height of 5.0 m.…

A: Formula of efficiency is as follows: η(%)=PoPin×100…

Q: A boat is powered by three 2600-kW engines. At the top speed of 27.4 m/s, the boat’s propellers…

A: Given: The power of one engine is 2600 kW. The top speed of the propeller is 27.4 m/s. The total…

Q: The third floor of a apartment is 9.4 meters above street level. How much work is needed to move a…

A:

Q: 2. How much work is done by 15 kW engine during 3.5 min?

A: Given value--- power = 15 kW. time = 3.5 min . We have to find--- work ?

Q: 1. Simple machines make work easier by increasing what? a. The distance over which work is done b.…

A: 1. Simple machines make work Simple mechanical work :- It makes the work done easy by reducing the…

Q: 2. A fixed pulley is driven by a 100 kg mass falling at a rate of 8.0 m in 4.0 s. It lifts a load of…

A: Write the given values with the suitable variables. M=100 kgh=8 mt=4 sm=75 kg Here, M, h, t, and m…

Q: Compute the work (in joules) required to compress a spring 9 cm more when it is already compressed 5…

A: Given data:  Initial compression in spring (x1)= 5 cm = 0.05 m Then Spring compressed 9 cm more…

Q: A young girl had been eating too much chocolate. How much work must she do to offset the 300…

A: Law of conservation of energy: According to this law " the energy cannot be created or destroyed it…

Q: work done by an external agent for first one sec is

A: Given; Determine the workdone by an external agent for the first one sec ?  Where, Displacement of a…

Q: A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic power, in kW…

A:

Q: 1. A water pump pumps out 2400kg of water per minute. (A) if water is coming out with a velocity of…

A: Given data: Mass of the water m=2400 kg Time t=1 min =60 s Velocity v=3 m/s

Q: If the efficiency of a coal-fired electrical generating plant is 35%, then what do we mean when we…

A: Given: Efficiency of coal fired engine is 35 %

Q: Find the work done by th c F (N)A 10 -x(m) 25 50

A: Find the work done by the constant force. Work done is define as the area under the curve of…

Q: 1. THE PITCH OF A JACKSCREW SHOWN IN FIGURE BELOW IS 0.3 CM AND HAS A LEVER ARM OF 60 CM LENGTH.…

A: Write the given values of this problem. Pitch distance of a jackscrew(P)=0.3 cm or 30 mLever…

Q: Explain what does work do to the total amount of energy?

A: Work is said to be done when a force is applied through a distance.This means that when a force is…

Q: 4. A motor having an efficiency of 90% operates a crane having an efficiency of 40 %. With what…

A: Speed of the object lifted depends on the Ratio of the gear or pulley  which enable the motor shaft…

Q: A 500 N object is lifted to a height of 1 meter using a 10 m long inclined ramp. The laborer only…

A:

Q: Find the work required to pitch a 6.1 oz softball at 95 ft/sec. The work required to pitch a 6.1 oz…

A: Weight of ball,w=6.1 ozvelocity of ball,vf=95 ft/s

Q: Which of the following is not an equation for getting work? Select one: a. W=Fd b. W=Fdcosθ c. W=N⋅m…

A:

Q: allison exerts a force of 186 N on a lever to raise a 2.70 x 10^3 N object to a height of 29.0 cm.…

A: Given Effort = E = 186 N Load = L = 2.70 × 103 N = 2700 N Rise of object height = ho = 29.0 cm…

Q: A man exerts a force of 50 N to push a 150 N box up a plane 4.0 m long on to a platform 1.0 m above…

A:

Q: A water fountain uses 125 Watts of power each hour. It is run 24 hours each day for 7 days. If…

A: The formula for the amount of energy consumed by the fountain is:

Q: A car requires 170kiloJoules to accelerate from 23m/s to 28m/s. If this happens over 2 seconds, what…

A: Power is defined as the rate of doing work. Power is a scalar quantity and the SI unit of power is…

Q: 15. Refer to the graph below. Calculate the total work done from t = 0.00m to t= 8.00 me 12 10 2 Ar…

A: The area under the curve of the force v/s displacement graph gives the work done.

Q: A coal power plant has a rated output of 150 MW and a first law efficiency of 41%. Coal has an…

A: Given information: The energy density of the coal (C) = 24 MJ/kg The power output of the power plant…

Q: A 1500kg car is travelling with an initial velocity of 30.0 km/h while traveling through a school…

A: This question is based on Work Power and Energy topic. Power formula: Efficiency formula:

Q: 44. A metal ramp 6.00 m long is tilted 10.0° and is used to load and unload a moving van. Suppose a…

A:

Q: What is the height at point A if the KE at point c is l03.4I? Calculate PE, KE ùnd V. at point B.…

A: Using conservation of Energy at point A and Point C Total Energy at point A=Total energy at point C…

Q: Give definition of efficiency. Also write its equation.

A: Efficiency can be defined as the ratio of the Output of the system and the Input of the system.…

Q: If you expended 1500 watts for 3 hours, how many kilowatt-hours (kWh) would that be? Enter answer as…

A: Given Information:- Expended power is P=1500 W Time t=3 h Required:- We have to calculate the amount…

Q: A fuel-powered loader raises a 2.2 x 103-kg load from the ground to a loading platform, which is 2.7…

A:

Q: Question: 1. Suppose that the elevator is broken in the building n which you work and you have to…

A:

Q: 5. An elevator motor in a high-rise building can do 3500 kJ of work in 5 min. Find the power…

A: Given: The work done by the elevator motor is 3500 kJ. The time interval is 5 min.

Q: A 2 meter high inclined plane with a length of 10 meters allows you to move a box that weighs 750…

A: Given Data : The height of the incline is given as H = 2 m. The length of the incline is given as L…

Q: You are using a lever to lift the edge of a crate in order to slide a roller under it. The crate…

A: A) Input work done is Wi=EfEd=450 N0.8 m=360 J Output work done is Wo=RfRd=4250 N0.05 m=212.5 J

Q: Using a block and tackle, a mechanic pulls 10.2m of chain with force of 85 N in order to lift a 290…

A:

Q: A man whose mass is 70 kg walks up to the third floor of a building. This is a vertical height of 12…

A: Given data: Mass of the man m = 70 kg Height of the floor =12 m

Q: Explain why machines are never 100% efficient?

A: Given:  A machine which is 100% efficient.

Q: Complete information on mechanical work in M. K. S. units from the following table

A: Tension, length, force and acceleration quantities are asked.