A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 740-kg helicopter rises from rest to a speed of 9.5 m/s in a time of 4.0 s. During this time it climbs to a height of 7.4 m. What is the average power generated by the lifting force?

Q: 6. The kinetic energy of a car is 8 × 106 J as it travels along a horizontal road. How much work is…

A: According to work-energy theorem, Here, KEi and KEf represent the initial and the final kinetic…

Q: A machine carries a 8.0 kg package from an initial position of d ; = (0.6 m) i + (0.79 m)j + (0.26…

A: Given: di=0.6m i^ + 0.79m j^ + 0.26m k^df=10.5m i^ + 15.0m j^ + 10.2m k^∆t = 15 sF = 4.0N i^ +7.0N…

Q: A car of mass 1,000 kg moves with a speed of 5.00 m/s. If the car triples its speed to 15.0 m/s then…

A:

Q: The kinetic energy of a car is 8 x 10° J as it travels down the road. How much work is required to…

A: Initial kinetic energy of the car, Ei=8×106J

Q: When 150 J of work is done on a system by and external force of 15 N in 20. seconds, the total…

A: The work done on the system is 150 J by the external force force of 15 N is 20 sec.

Q: What is the work required to raise a 200 kg barbell to a height of 1.25 m? O 2 500 J O 1755 J O 3…

A: Write the expression for the work done to raise a barbell. Here, m represents the mass, g…

Q: Chapter 07, Problem 047 A machine carries a 7.0 kg package from an initial position of d; = (0.7 m)…

A: The work done by a body is the scalar product of the force applied and the displacement of the body.…

Q: Estimate the work (in J) you do to mow a lawn 20 m by 20 m with a 60-cm-wide mower. Assume you push…

A: in this question  we use simple work equation.

Q: A 1000 kg car moves with a speed of 20 m/s. Suddenly the driver speeds up to 30 m/s, what is the…

A:

Q: Question 15 A baker pushes a cart full of rolls with a force of 20.0 N for a distance of 4.0 m. How…

A: Given data The force applied by the baker is given as F = 20 N. The distance traveled by the baker…

Q: A particle of mass 2.9 kg moves along the horizontal x-axis. In the x direction the only force…

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: A mother does 220 J of work while pulling her child back on a frictionless swing, whose chain is 4.7…

A: Correct Answer: The mass of the child is 26.4 kg. Note: Please recheck your given option as all the…

Q: A horse is pulling a sled at a velocity of 3.5 m/s. If the horse's power output is 250 W, what is…

A: Given data:  Velocity (v) = 3.5 m/s Power (P) = 250 W Required: Force (F)

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

A:

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

A:

Q: A 950 kg car accelerates from rest with a constant power of 145 hp. Neglecting air resistance, what…

A: Mass of the car=950kgPower =145hp=108126W (1hp=745.7W)Energy gained in…

Q: A car's engine generates 120,000 W of power as it exerts a force of 12,000 N. How long does it take…

A: Force=12000 N Displacement=120 m Work done(W)=Force*Displacement=12000*120 J=1440000 J

Q: A runner exerts a force of 334 N against the ground while running a distance of 50.Om. The runner's…

A: Force exerted, F = 334 N Distance walked, s = 50 m Power, P = 3.71 kW = 3710 W   Work done by the…

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: QUESTION 6 A college student pushes a 40-kg filing cabinet that is initially at rest with a…

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: A toad with mass of 117 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: Given data The mass of the toad is m=117 g The angle of projection is θ=26o The initial velocity is,…

Q: A leaky bucket, which weighs 2 N empty and initially has 10 N worth of water in it, is lifted into…

A: Work done will be equal to change in the potential energy of the bucket. Let the potential energy at…

Q: A force F = bx3 acts in the x direction, where the value of b is 3.7 N/m3. How much work is done by…

A:

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 machine carries a 3.5 kg package from an initial position of d, (o.50 m)i + (0.75 m)j + (0.20 m)k…

A: Given data: The mass of the package is m=4 kg  The initial position is di=(0.50 m) i+(0.75 m)j+(0.20…

Q: A person pulls a 20 kg heavy box horizontally, which slides at a constant speed. The person makes a…

A: Given data: The mass of crate is m=20 kg. The maximum force applied is F=60 N. The distance traveled…

Q: A duck is flying across a river at a speed of 2.0ms. It has a mass of 3.0kg. What is the kinetic…

A: Given: The mass of the duck is 3 kg. The speed of the duck is 2 m/s.

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: An object with a mass of 500 g is released from a helight of 40 m. Since the air friction is…

A: (3) Write the mass of the object. m=500 kg   Write the initial height of the object. h=40 m

Q: A 2000 kg car with a 250 HP (1.865 X 105 W) engine accelerates from rest. If all the engine’s power…

A:

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, Power generates engine of the car, P = 80000 Wforcec exerted by engine, F = 6000 Ndistance…

Q: An accelerating object of mass m=12 kg is fired with an initial speed v;-5 m/s at a starting point.…

A: Given: The mass of the body is 12 kg. The initial velocity of the object is 5 m/s. The final kinetic…

Q: An apple falls from a tree and drops straight to the ground. Its initial height was 2.3 m , and its…

A:

Q: What is the kinetic energy of a 12 000 kg truck moving at a speed of 25 m/s? Select one: a. 3.8 x…

A: We know Kinetic energy is given by : K.E.=12mv2 And Given : m=12000 Kg v =25 m/s

Q: 19. If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60.0 s, at…

A: average weight of a passenger= 660 N Total weight lifted= 100×660= 66000 N Height H= 150 m time…

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: A total force of 500 N is applied to pull a box on a rough surface along a distance of 60 m. If…

A: Given : Total force (F) = 500 N Distance (d) = 60 m Work done against friction (Wf) = 1000 J

Q: "A toy rocket, weighing 10 N, blasts straight up from ground level with a kinetic energy of 40 J. At…

A:

Q: 20. Student A lifts a 40.-newton box from the flöor to a height of 0.30 meter in 2.0 seconds.…

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

Q: A force moves an object in the direction of the force. The graph in the figure shows the force…

A: force versus displacement graph is given for object in motion . the force is plotted along y axis…

Q: An accelerating object of mass m=14 kg is fired with an initial speed v-2 m/s at a starting point.…

A:

Q: A machine carries a 4.5 kg package from an initial position of d, - (0.50 m)î + (0.75 m)î + (0.20…

A: The work done by a force to move a body by a certain distance is given by W = F.s, where F = the…

Q: An accelerating object of mass m=4 kg is fired with an initial speed v=3 m/s at a starting point. If…

A: Initial velocity, u =3 m/s Mass, m = 4 kg Final Kinetic energy, K.E.2=380 J