scooter, with the engine on, down a 19-m-long ramp that starts at a height of 2.5 m. Her speed is just 3.5 m/s at the top of the ramp, but 17.8 m/s when she gets to the bottom. The total mass of the woman and her scooter is 86 kg. How many joules of work, W, were done on the scooter by the Earth's gravitational force, as she went down the ramp?

Q: A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500 N. What…

A: Given,mass of the car, m = 710 kgspeed of the car, v = 23 msdrag force, F = 500 Nslope of the…

Q: We hang a 1.0 kg weight on a vertically suspended coil spring. The spring gets extended by 3.0 cm.…

A:

Q: A horizontal force F is applied to move a 6kg carton across the floor. If the carton starts from…

A: Mass of carton (m) = 6 kg Applied force = F Initial speed (u) = 0 mstime (t) = 3 seconds Final speed…

Q: force is equal to the weight w=mg

A:

Q: A 520-kg dragster accelerates from rest to a final speed of 105 m/s in 390 m, during which it…

A:

Q: A child does 358 J of work while pulling a box from the ground up to his treehouse at a steady speed…

A: work done by child = 358 J height of treehouse above the ground = 3.1 m

Q: Adam drove a bike 1260 m with an average speed of 115m/s. Suppose he applied the brakes to reduce…

A: According to the work-energy theorem, the work done by the brakes will be equal to the change in…

Q: Gurtej was driving his car at 120 km/hr when he decides to brake. His car glides to rest over a 26.4…

A: Write the given values with the suitable variables. u=120 km/hr=120×10003600 m/s=33.33 m/sv=0…

Q: Juana slides a crate along the garage floor. The coefficient of kinetic friction between the crate…

A:

Q: A motorist runs out of gas on a level road 190m from a gas station . The driver pushes the 1,220 kg…

A:

Q: A motorist runs out of gas on a level road 150 m from a gas station. The driver pushes the 1,120 kg…

A: Given: Distance traveled, d=150 m Mass, m=1120 kg Force, F=180 N Formula: Work=Force×distance W=F×d

Q: A force of 16 lb is required to hold a spring stretched 4 in. beyond its natural length. How much…

A:

Q: A 62.6 kg runner has a speed of 5.10 m/s at one instant during a long-distance event. How much net…

A: We know:

Q: An electric elevator with a motor at the top has a multistrand cable weighing 6.5 lb/ft. When the…

A:

Q: A 430g book is dropped froma height of 1.9m. What is the kinetic energy of the book at the moment it…

A: Kinetic energy gained equals the change in potential energy. Ekinetic=Utotal-Uhalfway=mgh-mgh2=mgh2

Q: A 51-kg woman runs up a flight of stairs in 5.0 s. Her net upward displacement is 5.0 m. How much…

A: Answer Given  Mass m = 51 kg Time t = 5 s Height h = 5 m

Q: A 60.0-kg woman climbs a staircase to a level 11.0 m above her starting point in 66.0 s. (a) How…

A:

Q: A ball toy of mass 22.7 g is thrown straight up with an initial speed of 2.8 m/s. Neglect air…

A:

Q: Wé are creating comething called

A: Given: Mass of cat m=5kg Power P=196 watt.

Q: Jerry was told to mow the lawn. He pushed down on the lawn mower with 728 N of force with and angle…

A: Given Force F = 728 N Displacement S = 231 m θ = 650

Q: Suppose a 74 kg sprinter, starting from rest, runs the first 9 m in 3 s at constant acceleration, a…

A: Given Mass of a sprinter = 74 kg sprinter starting from rest, Distance traveled in first 3 sec = 9 m…

Q: A 62.1 kg runner has a speed of 4.30 m/s at one instant during a long-distance event. How much net…

A: Given Mass m                = 62.1 kg Initial velocity v1 = 4.30 m/s Final velocity v2  = v1× 3 =…

Q: A girl with a 40 kg mass is riding an 8 kg bike. At the top of the hill her speed is 6 m/s and her…

A:

Q: A 1000kg car moving at 22.8 m/s on a flat road slams on the brakes and skids to a stop. The…

A: Mass of the car (m) = 1000 kgInitial velocity (v) = 22.8 m/sCoefficient of kinetic friction () =…

Q: A motorcyclist runs out of gas on a level road 250 m from the gas station. She pushes the 220-kg…

A: distance of the gas station (d) = 250 m mass of motorcycle (m) = 220 kg  Applied constant force (F)…

Q: what is the net work done on the cart?

A: Given data: Applied force, Fa=245 N Mass of cart, m=12.5 kg Frictional force, Ff=45.1 N Distance…

Q: A motorist runs out of gas on a level road 210 m from a gas station. The driver pushes the 1,120 kg…

A: The work done is defined as the force applied over the distance , thus it is calculated by using the…

Q: A 64.0 kg cheetah accelerates from rest to its top speed of 32.5 m/s. (a) How much net work (in J)…

A: (a) According to the work energy theorem, W=∆K=12mv2-12mu2=12mv2-u2 Substitute the values, to find…

Q: The equation F = (6x5 + -7x4 + -5) describes the force applied on a 8.02 - kg particle, where F is…

A: Given, Force=6x⁵-7x⁴-5 We have to find the workdone.

Q: A 10 kg barbell is rolling down a hill. There is no friction or air resistance acting on it, only…

A: Mass of the barbell is m = 10 kg Initial speed is u = 2 m/s Final speed is v = 7 m/s The only force…

Q: A 2000 kg car can accelerate from rest to 50 m/s in 4.2 seconds. How much power does the engine…

A: The initial speed of a car is, u=0 m/s The final speed of a car is, v=50 m/s The car's mass is,…

Q: A heavy rope, 50 ft long, weighs 0.3 lb/ft and hangs over the edge of a building 140 ft high. (a)…

A:

Q: A child pulls a sled upon snow covered hill. The child does 400 J of work on the sled. If child…

A: