Suppose that as part of their training, the football players of MSU went up a stair in 66 s. The length of the stair is 140 m and inclined at 32°. Calculate the average power required for a player of mass 95 kg. a. 700 W. b. 800 W. c. 900 W. d. 1 000 W. e. 1 100 W.

Q: Staning from rest, a car of mass 1700 kgreaches a speed of 15 ms in 7.8 s What is the average power…

A:

Q: 32. A skier leaves a ski jump at 15.0 m/s at some angle. At what speed is he traveling at his…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 3. Consider a 65-kg object moving at a speed of 12 m/s. Use work and energy to solve for the…

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Q: Explain about Work done by a force.

A: When a force acts on an object over a distance, it is said to have done work on the object.  It is…

Q: The rate at which work is done is known as .

A:

Q: 1. A car starts at rest, and ends up with 1500 J of KE. How much Work was done on it?

A: As per our guidelines, we are supposed to answer only first one question in case of multiple…

Q: A small motor is used to operate a lift that raises a load of bricks weighing 1200N to a height of…

A:

Q: How much work do you do if you pull with 50 N of force on a sled with a rope that makes an angle of…

A: Given- Force F= 50 N angle θ= 20˚ Distance d= 20 m

Q: A 60 HP electric motor lifts an elevator with a maximum total load capacity of 2000 kg. If the…

A: Given Data:  F=4000 N M=2000 kg g=10 m/sec2 P=60 HP 1HP=746 W

Q: You toss a 0.10-kg ball straight up at a speed of 2.0m/s. How much work is done by gravity when the…

A:

Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…

A: The rate  of doing work is called power.

Q: What power on the cable does it require to lift a 250 kg elevator cab and 4 passengers each with a…

A: mass of elevator cab = 250 kg Number of passengers = 4 mass of each passenger = 50 kg Height (h) =…

Q: 11. Airflow lifts a 3.6 kg bird 50 m up. How much work was done by the flow?

A: We know that, Law of conservation of energy states that energy can neither be created nor…

Q: A 190 g object is dropped from a height of 7 meters. Calculate the potential and kinetic energy of…

A:

Q: Work is energy transfer. When work is positive A. energy is transferred to the surrounding. B.…

A: When work is positive then energy is transferred from surrounding to the system as per first law of…

Q: How much mechanical work is required to mov feet to your heart, approximately 1.0m higher? A) 1 J B)…

A: Given:- 13 )  The mass of the blood m = 1.0 kg  [ Given ]  The height h = 1.0 m  [ Given ]  Find:-…

Q: 8. A block is moving with 52.0 J of KE. A 12.0N force pulls the block straight forward for 3.00 m.…

A:

Q: A cheetah can accelerate from rest to 6.4 m/s (about 16 m/h) in 1.2 seconds. How much average power…

A:

Q: 37. A truck of mass 900 kg is travelling along a straight level road against a constant resistance…

A: A truck of mass 900 kg is travelling along a straight level road against a constant resistance of…

Q: 4. I could better understand energy transfer if I ... Answer:

A: The capacity of doing work is called the energy of the body. The amount of work, that a body can do…

Q: 1. If you pushed a 20 kg box across the floor for a distance of 60 m with a force of 15 N how much…

A: #1 Given data: The mass of box is m=20 kg. The distance traveled by the box is d=60 m. The force…

Q: 6. A truck weighing 1,000 kg runs at 120kph carrying a load of 1,200kg at its back. It travelled at…

A: Given, mass of truck is mt=1000kg the velocity of the truck vt=120kph mass of load is ml=1200kg…

Q: ents took turns applying a force to an object in a physics lab. The graph below shows the force…

A: Four students took turns applying a force to an object in a physics lab. The graph below shows the…

Q: 9. What unit is equivalent to a J/s?

A: Dear student,  Since all questions are different as per guidelines we can author only first one.…

Q: 32. A ______________ force is a force that does zero work on a closed path.   a. Non-conservative b.…

A: Work done by conservative force is independent of path and depends only on end points so its 0 in…

Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…

A:

Q: p A 1000 kg sports car accelerates from zero to 25 m/s in 7.5 s. What is the average power delivered…

A: Given data: Mass (m)= 1000 kg Initial velocity (u) = 0 m/s Final velocity (v) = 25 m/s Time (t) =…

Q: Which of these would have the greatest potential energy? A. A roller coaster at the top of a hill.…

A: To determine Maximum potential energy of a Roller Coaster Ride

Q: 4. A body moves a distance of 10 m under the action of a force that has a constant value of 5.5 N…

A:

Q: 12. When you go upstairs, you a. do more work when you walk than when you run b. do less work when…

A: 12.) Work depends on force and displacement only as force acting during running or walking is weight…

Q: 5. If the sign for work is negative, * O a. Kinetic energy is increasing. O b. Kinetic energy is…

A: work energy theorem. Work done is equal to change in Kinetic energy. W = K.E 2- K.E 1 K.E. 2 -…

Q: A 60.0 kg trunk starts at rest on a student's dorm room floor. The student pushes the trunk a…

A: Solution:-Given thatmass of trunk (m)=60 kgdistance travelled by trunk (d)=10 mForce (F)=300…

Q: III. WORK 8. How much work was done by a machine that exerts a 5000 N force to compress a…

A: Given, Force applied by machine, F = 5000 N compress a 10 m long steel bar so it becomes 3 m

Q: A block is moving with 52.0 J of KE. A 12.0 N force pulls the block straight back, against the…

A: Given data: Initial Kinetic Energy (KEi) = 52.0 J Force (F) = 12.0 N, straight backward Displacement…

Q: 7. A ball is thrown straight up. Neglecting air resistance, which statement is not true regarding…

A: A ball is thrown straight up with some initial velocity. Air resistance is neglected.

Q: Determine the unit of energy if the power is measure in watts and the time in minutes.

A: Energy is the ability to do work.  Power is the rate at which work is done.  We can express energy…

Q: The power expended applying a force of 50 Newtons to lift a bucket a distance of 2 meters in a time…

A: Given  Weight of bucket ( w = mg) = 50 N  height (h) =  2m Time taken = 2.5 s  Power is defined as…

Q: Two cars have the same mass, but one is moving three times as fast as the other is. How much more…

A:

Q: A block is at rest. A 40.0 N force directed 38.0° above horizontal pulls the block 8.00 m across…

A: Given data: Initial velocity (v0) = 0 m/s Force (F) = 40.0 N Angle (θ) = 38.0° Displacement (d) =…

Q: 2. An electric drive features a 24 kWh battery pack and has a range of 170 km at a constant speed of…

A: We will answer the question by using expression relating power and energy. The details are as…

Q: 92. It is defined as the rate at which work is done. * a. Joule O b. Newton O c. Speed O d. Power O…

A: The work is defined as W=F→·d→ Here F→ is force and d→ is displacement. The force is  F→=ma→ Here m…

Q: The Efficiency of a car engine is 25%. The total resistance to motion is 1000 N when the car is…

A: Efficiency = 25% force (F) = 1000 N energy output in 1 liter of petrol = 40 MJ