A machine gun fires 60 bullets per minute, with a velocity of 700m/s. If each bullet has a mass of 50g, find the power developed by the gun. a) 1225W b) 12250W c) 122.5W d) 122W

Q: A volcano spews a 350kg rock vertically upward to a height of 550m. (a) With what velocity was the…

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Q: 4. An engine that worked for 46 s consumed E = 23,500 J and lifted a in 75 kg body from the ground…

A: Work done for lifting an object from the ground is equal to change in the gravitational potential…

Q: How much work is done (how much energy is required) to accelerate a 1987.5 kg car entering the…

A: According to  work-energy theorem work done is equals to changes in between Final kinetic energy and…

Q: maximum power transfer takes place at an efficiency Select one: a. 25 % b. 50 % c. 75 % d. 100 %

A: The efficiency is defined as the ratio of the out put power to the in put power.

Q: #13

A: 9)the power is the energy per unit time or work done per unit time. the work is to be done to rise…

Q: 6. Research the power of two different things and report back their power in watts Eg. An onland…

A: 6.  Power is amount of energy transferred or converted per unit time.     A solar panel can produces…

Q: . Jordan is 32kg and walks up stairs. She travels a vertical distance of 2 meters. Determine how…

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Q: 500 joules of work was done in 10 seconds, the power used was A. 0.025 watts B. 0.025 N C. 40 N D.…

A: Given value--- work = 500 J. time = 10 sec. We need to find--- Power ?

Q: A 150 g baseball is thrown so it acquired a speed of 20 m/s. Calculate the work done to make it…

A: Mass of baseball (m)=150 g=0.15 kg Speed of baseball after it is thrown (v)=20 m/s

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: Calculate the work done by a 1500 watts appliance if it runs for 300 seconds

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

Q: 27.) W out is always smaller than W in because when a machine is used, not all of the energy it…

A: 27. When a machine is used, due to the friction some of the input energy convert in to thermal…

Q: 3. A jet engine exerts 1.0 x 105 N of thrust (force) while moving an airplane forward when the speed…

A: Given  Thrust force  (F) = 1.0×105 N     Speed (v) = 900 km/h                    = (900×1000)…

Q: The force required to tow a vehicle at constant velocity is directly proportional to the magnitude…

A: Given: P=1000 W velocity1 = 10 m/s velocity2 = 08 m/s

Q: A cheetah can accelerate from rest to 7.4 m/s (about 18 m/h) in 1.8 seconds. How much average power…

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Q: Two carts have the same mass. Both carts start at rest and are pushed until one cart is going two…

A: The work energy theorem states that the work done by the net force on a body is equal to change in…

Q: A student drags a 3 kg box 5 m across a rough floor with a force of 40 N. A frictional force of 10 N…

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Q: 25. A donkey is pulling a sled at a velocity of 3.5m/s. If the donkey’s power output is 890 W, what…

A: Let F be the force that the donkey exerts on the sled. Given that a donkey is pulling a sled at a…

Q: Calculate the input power P of the engine, the mechanical work W it produced and its output power P,…

A: (b) The input power of the engine is the rate at which the energy is consumed by the engine. From…