A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s . How far up does it move?

Q: ohn, of mass 82.4 kg can do work for about 2.0 minutes at the rate of 1.0 hp. How long will it take…

A: Given data: Mass (m) = 82.4 kg Power (P) = 1.0 hp Height (h) = 12.0 m 1 hp = 746 watts Required:…

Q: 6. A child does 350 J of work to lift a box from the ground up to his tree house at a steady speed.…

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Q: A 15 kg object is attached to a spring that is compressed, and the spring is released so that it…

A: The object's mass is, m=15 kg The applied force on the mass is, Fm=13 N The displacement of a spring…

Q: .An advertisement claims that a certain 1300 kg car can accelerate from rest to a speed of 25 m/s in…

A: Please see the answer below

Q: An electric engine in a 2.0 kg remote-control toy car has a power output of 4.0 W. How fast will it…

A: Energy = Power * time P=power = 4 W time=t=5 s   Energy=E= 4*5=20   mass=m=2.0 kg

Q: A 62.0 kg skier starts from rest at the top of a ski slope 55.0 m high. (a) If the frictional forces…

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Q: A7.3 kg raccoon climbs a 6.9 m tall tree in 22.5 s, how much work does the raccoon do

A: given mass of raccoon m = 7.3 kg height to climb h = 6.9 m time taken t= 22.5 s work done W = mgh…

Q: One of the forces exerted on a particle is F = Bx²i, where B = 6 N/m². How much work does F do (in…

A:

Q: How much work is needed to change the speed of a 2375 kg sport utility vehicle from 15.0 m/s to 60…

A: Given data:  Mass (m) = 2375 kg Initial velocity (Vi ) = 15.0 m/s Final velocity (Vf) = 60 m/s…

Q: A 5.0-kg cart is moving horizontally at 4.0 m/s. In order to change its speed to 9.0 m/s, the net…

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Q: What is the work done by the moving force in Joules

A: Mass, m=7Kg Velocity, v=20m/s Height, h=8.75m

Q: A 2.0-kg potato has been launched out of a potato cannon at 9.0 m/s. What is the kinetic energy? If…

A: mass, m = 2 kg, velocity, v = 9 m/s , height, h = 4 m

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

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Q: Football players measure their acceleration by seeing how fast they can sprint 40 yards (37 m). A…

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Q: a toy car (0.50kg) runs on a frictionless trackand has an initial kinetic energy of KE =1.6. over…

A:

Q: A bag of wheat weight 100 kg. To what height should it be raised so that potential energy is 120 J?…

A: Given: The mass of the object is 100 kg. The potential energy of the object is 120 J. The…

Q: I have a motor that is rated for 6000 W. What is the maximum amount of work that the motor can do in…

A: Given data The power of the motor is P = 6000 W The time taken to work is t = 10 s The mass of the…

Q: It takes 157 kJ of work to accelerate a car from 23.4 m/s to 27.3 m/s. What is the car's mass?

A: Given, Work done, W=157 kJ Initial velocity, u=23.4 m/s Final velocity, v=27.3 m/s

Q: A 710 kg car is moving on level ground at a constant speed of 23 m/s. It is subject to a drag force…

A: Given data:  Force (F) = 500 N Speed (v) = 23 m/s Required: The power (P)

Q: A 56.5-kg person is running and accelerates from 3.67 m/s to 8.29 m/s in 5.67 s. How much power does…

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Q: It takes 212 kJ of work to accelerate a car from 21.7 m/s to 29.2 m/s. What is the car's mass?

A:

Q: The goal of a worker is to slide a m=20-kg crate up a L=2.5 m-long inclined at θ=25°. The worker was…

A:

Q: For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at…

A: Given: The weight is 400 N. The height lifted by athelet is 2.2 m. The time interval is 1.6 s.

Q: How far must you stretch a spring with k = 1000 N/m to store 200 J of energy?

A: It is given that,

Q: An accelerating object of mass m=17 kg is fired with an initial speed v-8 m/s at a starting point.…

A:

Q: A car of weight 100 kg. To what height should it be raised so that potential energy is 1230 J? Take…

A: Given  Mass (m) = 100 kg  Potential energy (PE) = 1230 J    Gravitational Potential energy is given…

Q: What is the average power must produce to accelerate car with 1500 kg from rest to the speed 30…

A:

Q: A rock with a mass of 3.40 kg is moving with velocity (5.60î – 1.40j) m/s. (HINT: v = v· v.) (a)…

A: Given data: The mass of rock is m=3.4 kg. The velocity of rock is v→=5.6i^-1.4j^ m/s. The new…

Q: A block of mass 2.0 kg is moving to the right and changes its speed from 3.0 m/s to 1.0 m/s. Match…

A: Given data:  Mass (m) = 2.0 kg Initial velocity (Vi) = 3.0 m/s Final velocity (Vf) = 1.0 m/s…

Q: A bird of mass m = 2kg flies at a height h = 10 m from the ground with a constant horizontal speed v…

A: The mass of the bird, m=2 kg   The height, h=10 m   The horizontal speed, v=10 m/s

Q: It takes 156 kJ of work to accelerate a car from 20.4 m/s to 28.2 m/s. What is the car's mass?

A: The mass of the car can be calculated in given steps:Given:

Q: In the figure, a frictionless roller coaster car of mass m = 810 kg tops the first hill with speed…

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Q: A horizontal force of 5 N is required to maintain a velocity of 2 m/s for a block of 10 kg mass…

A: Given data : Force=F Mass=m time=t Velocity=V   TO FIND : Work done

Q: A 10 N force pulled a body on the ground from x- 5 m to x=7 m, then the work done by this force on…

A:

Q: A 1000-kg car accelerates from 0 to 15 m/s in 5.0 s with negligible friction and air resistance.…

A:

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: The correct choice of answer is option (a) i.e. 1300 W

Q: ind the work done in joules by gravity as an object of the mass m=15 kg is raised up at constant…

A: Mass (M)= 15kg Value of g=10m/S2  Height change from 35 to 69

Q: A car's engine generates 80000 W of power as it exerts a force of 6000 N. How long does it take the…

A: Given: The power of the engine is 80000 W. The force exerted by the engine is 6000 N. The…

Q: Using 1000. J of work, a small object is lifted from the ground floor to the third floor of a tall…

A: Given parameter                        Work(W) = 1000J                        Time (T) = 20s

Q: An electric engine in a 2.0 kg remote-control toy car has a power output of 4.0 W. How fast will it…

A: Mass of engine = 2 kg  Power output = 4 W  Time = 5 seconds

Q: A skier of mass 70.0 kg is pulled up a slope by a motor drivencable. (a) How much work is required…

A: (a) The vertical distance travelled by the skier is

Q: Ben carries a 250 N suitcase up three flights of stairs (a height of 12.0 m) and then pushes it with…

A: Given data as per question weight of suitcase =250N Height =12 m Horizontal force =50N Speed =0.10…

Q: It requires 76 J of work to stretch an ideal very light spring from a length of 0.45 m to a length…

A:

Q: A 172 g box slides up a 17.3* ramp at a speed of 3.55 m/s. Using conservation of energy and assuming…

A: 12mv2=mgh=mglsinθl=v22gsinθ

Q: If gravity is pulling a 0.15 kg ball down 2.0 meters, what is the magnitude of the force doing work…

A: Given: The mass is 0.15 kg. The distance covered is 2.0 m.

Q: A 1.60-m-tall person lifts a 1.65-kg book off the ground so it is 2.20 m above the ground. What is…

A: Given data:  Mass (m) = 1.65 kg Height (h) = 2.20 m Required: Potential Energy (U)

Q: A car of weight 120 kg. To what height should it be raised so that potential energy is 2320 J? Take…

A: Given data :- weight of car m = 120 kg potential energy U = 2320 J g = 9.8 m/s2