e, 77 W of power and

Q: A car is cruising at a constant speed of 24 m/s. If the frictional force acting on the car is 571 N,…

A: Given: Speed of car v = 24 m/s Frictional force acting on the car f = 571 N

Q: A refrigerator does 270,000 J of work in 30 minutes. How much power does it generate? 30 minutes =…

A:

Q: A 10.00-kg object is lifted from the floor to a shelf. The object's new gravitational potential…

A:

Q: What is the cost of operating a 5.00 W electric clock for a year if the cost of electricity is…

A:

Q: If electricity costs 10.0 cents per kW·h, how much does it cost to operate the device for 9.1 hours?…

A: Given: Cost of electricity is 10.0 cents for 1 kW.h. The device is operated for 9.1 hours. If you…

Q: A force of 35 N is applied to a 15.3 kg object. The object moves 3.69 m in the direction of the…

A:

Q: A microwave oven has a power requirement of 1,248 W. A frozen dinner requires 5.0 min to heat on…

A: Given: The power required to microwave is 1248 W. The time required to heat the frozen dinner is 5.0…

Q: 1 Newton of force is applied to a stone to move 100 cm. Calculate the work done.

A: Given, Force = 1 N Displacement = 100 cm = 1 m Work done = ?

Q: A large household air conditioner may consume 13.0 kW of power. What is the cost (in $) of operating…

A:

Q: 10. An automobile is sitting on a hill which is 20 m higher than ground level. Find the mass of the…

A: Given: Potential energy = 362600 J  Height = 20 m

Q: What is the power in watts of a motor rated ¼ hp?…

A: Given: The power is 1/4 hp.

Q: A 14 kilogram boulder falls off a cliff and strikes the ground after falling 40 meters. How much…

A: Given data- Mass of boulder m=14 kg It strikes the ground after falling 40 meters so h=40 m

Q: A 2063 KG car accelerates from rest to a velocity of 25M/S in 13 seconds. The power of the engine…

A: Given:- The mass of the car is m = 2063 kg  The car starts from rest and achieves a velocity of v =…

Q: 8. What is the kinetic energy of a 1200 kg car travelling 90 km/h?

A: Given: The mass of the car is 1200 kg. The speed of the car is 90 km/h.

Q: 1200 J of work was in lifting a box to a height of 3 m. What was mass of the box?

A:

Q: What is the approximate cost of operating a 80 W light bulb for 3.0 h per day for 2 weeks, if…

A: Q9. The given data we have Rating of the bulb: 80W Total time the bulb was operated: 3.0h per day…

Q: A weightlifter lifts a 200-kilogram mass a vertical distance of 0.5 meter in 0.1 second. What is the…

A: Given data:  Mass (m) = 200 kg Height (h) = 0.5 m Time (t) = 0.1 s Required: Power (P)

Q: What is the approximate cost of operating a 65 W light bulb for 3.0 h per day for 1 week, if the…

A: The given values are, P=65 Wthour/day=3.0 h/daytday=1 week=7 daysrate=14 cents/kWh

Q: A 1250 kg car is moving at 16.6 m/s. Then, 377 kJ of work is done on the car to increase its speed.…

A: According to work-energy theorem, the work done by the net force on a body is equal to change in…

Q: 4. How long is the time required to consume a power of 213 J/s generated by a working motor that…

A:

Q: A large household air conditioner may consume 14.0 kW of power. What is the cost of operating this…

A: Unit of power=KiloWatt=KW Unit of Time=hour Power=Energy/time Energy=Power X time Unit of energy is…

Q: A microwave oven has a power requirement of 1,262 W. A frozen dinner requires 4.1 min to heat on…

A: Write the expression for the electrical energy. E=P×t Here, P is the power and t is the time.

Q: 28. How much work is done lifting a 3-m chain over the side of a building if the chain has mass…

A: Required : Work done in lifting a chain.

Q: An astronaut is in space and is weightless inside the space station. Does the astronaut have to…

A:

Q: A pallet weighing 575 N is lifted a distance of 20.0 m vertically in 10.0s. What power is developed…

A:

Q: How much work does a 5000 Watt clothes dryer do when you run it for 30 minutes? 30 minutes = 1,800…

A:

Q: 7. An electric motor with an efficiency of 80% has a power output of 4.00 horsepower. The power…

A: Given, Output power = 4 horsepower. Efficiency = 80% Motor runs for = 3 hour Charges = $0.15 per kWH…

Q: A 2,263 kg car accelerates from rest to a velocity of 20 m/s in 13 seconds. The powwer of the engine…

A:

Q: A microwave oven has a power requirement of 1,243 W. A frozen dinner requires 6.5 min to heat on…

A:

Q: power

A:

Q: How much power does it take to lift 40.0 N 11.0 m high in 6 s?

A: Given data:  Weight (mg) = 40.0 N Height (h) = 11.0 m Time (t) = 6 s Required: The power (P)

Q: What is the kinetic energy of a 1,904.53 kg car that travels at 7.92 m/s?

A:

Q: A frictionless cart is pulled 9.50 m up an inclined plane in 24.6 s. The power output of the motor…

A: Given S=9.50 m (displacement) T=24.6 s (time) P=3.30*102=330 W (Power of motor)

Q: 10. How much work is done to accelerate a 2,500 kg car from rest to a velocity of 27 m/s?

A:

Q: A fuel tank contains 25 × 1010 BTUs of energy. The fuel is converted into electrical energy in the…

A: Given:total energy of the fuel, E = 25×1010 BTU1 BTU = 1055.06 Jhence E = 25×1010×1055.06 J =…

Q: A 300W computer is used for 90 minutes. What is the energy used in kWh? How much will it cost to run…

A: Given Data: The power used by the computer is: P=300 W The time duration in which P amount of power…

Q: - A moving object whose initial KE is 10 J is subject to a frictional force of 2 N that acts in the…

A: Given data:  Initial kinetic energy (KEi) = 10 J Final kinetic energy (KEf) = 0 J Force (F) = 2 N…

Q: How much work is required to throw a ball with a mass of 0.44 Kg 23.4 m/s?

A: Here in this question we consider the ball initially is in rest.                 i.e. vi = 0 m/s.…

Q: In the figure shown, if the mass (m=7 Kg) is moving with constant speed and traveled a distance d=10…

A:

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: A lamp consumes 500 J of electrical energy in 20 sec. What is the power of the lamp?

A: Power of the lamp is calculated by the formula:   Power = Energy consumed per unit time   Power =…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.