An advertisement for a portable electrical generating unit claims that the unit’s diesel engine produces 28,000 hp to drive an electrical generator that produces 30 MW of electrical power. Is this possible? Explain.

Q: A machine gun fires 360 bullets per minute. Each bullet has a mass of 5 grams and travels at 600…

A: Given: A machine gun fires 360 bullets per minute. mass each bullet of 5 grams  v = 600 m/s   To…

Q: A cheetah can accelerate from rest to 6.4 m/s (about 11 m/h) in 1.0 seconds. How much average power…

A:

Q: 9. Elena and her classmates were attempting to measure the maximum power they can generate by…

A: mass of Elena = 55 kg height = 4 m time = 3.5 seconds a) Work done by Elena = mgh = 55 * 9.8 * 4  =…

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: Is work done whenever an object moves through a distance? Explain.

A: SOlution: To explain, if the work done whenever an object moves through a distance

Q: Two people of the same mass climb the same set of stairs . Person A climbs the stairs in 25s. Person…

A: Since both the persons have to climb the same set of stairs, the work done by both the persons is…

Q: Is work done whenever a force is exerted? Explain.

A: Force F is applied to body to displace it from one position to another position, then work done on 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: 1. Two blocks are connected by a very light string passing over a massless and frictionless pulley.…

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Q: Your friend wants to solve the world’s energy problems by inventing a device that will deliver ten…

A: The world or the universe works on some conservation laws. The energy conservation says that energy…

Q: To get a feeling of the concepts of power and energy, let us look at the power and energy generated…

A: Energy is just the capacity to do work. Power is just the rate of energy consumption or expenditure.…

Q: 27. How much power is required to do 18O J of work in 2.4 s?* O 432 J O 432 W O 75 J O 75 W

A:

Q: 78. The surfer in the photo is catching a wave. Suppose she starts at the top of the wave with a…

A:

Q: Motor A has twice the horsepower of motor B. Does this mean that motor A can do twice the work that…

A: Power (P) = Work Done (W) / Time (t) where SI unit of power is Watt (W)  where 1 horse power (hp) =…

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: 19. An object moving along the x axis is acted upon by a force F that varies with position as shown.…

A: The work done is given by the expression,

Q: rocket is launched straight up from the ground. the initial kinetic energy of the rocket was…

A: During the launching of rocket, height is zero(PE=mgh=0) hence whole of the energy of the rocket…

Q: A horse pulls a cart with a force of 0.2 kN at an angle of 27 degrees with the horizontal and moves…

A: Given: The applied force is 0.2 kN. The angle of the force with horizontal is 27o. The speed of the…

Q: About 50,000 years ago, a meteor crashed into the earth near present-day Flagstaff, Arizona.…

A: Consider the mass of meteor is about 1.4×108 kg which hits at a speed of 12×103 m/s.

Q: A weight lifter bench‑presses a 150.0 kg barbell from his chest to a height equal the length of his…

A: Using work energy theorem,

Q: A man starts at ground level and carries a 20 kg box up a flight of stairs to a height of 3.6 m. He…

A:

Q: 1. Why are we more tired after running upstairs in a few seconds than after walking upstairs in a…

A: Power is the rate at the energy being transferred or  energy being converted from one form to…

Q: A cheetah can accelerate from rest to 7.4 m/s (about 17 m/h) in 1.1 seconds. How much average power…

A: Given that  initial velocity u = 0 m/s final velocity  v = 7.4 m/s initial taken t = 1.1 s mass of…

Q: An object of mass 12kg,initially at rest ,is lifted from the ground to a final height of 10m by a…

A:

Q: Jack lifts a 60-kg crate onto a truck bed 1 meter high in 3 seconds. Jill lifts sixty 1-kg boxes…

A: Given Jack lift 60 kg in 3 sec Jill lift 61 kg in 2 min or 120 sec Height upto which weight is…

Q: A typical wind turbine extracts 40% of the kinetic energy of the wind that blows through the area…

A: For given turbines, mass of the air m=110000 kgvelocity v= 15 ms-1the effective KE provided to…

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: