A 20kg box has an inital velocity of 20 m/s to the right. A person applies a force of 200N to the left. Friction does -500J of work. Calculate the final velocity of the box after it has traveled 4 meters.

Q: In the figure shown, if the mass (m-9 Kg) is moving with constant speed and traveled a distance d=20…

A: Multiple question. Answer for first image is provided below. Given : Mass, m = 9 kg Force, F = 10N…

Q: A rock of mass 0.050 kg is thrown upward with an initial speed of 25 m/s. Find the work done by…

A: Given data: Mass of rock is, m=0.050 kg. Initial speed of throwing the rock is, u=25 m/s.

Q: What will be the kinetic energy of a pile driver ram when it undergoes a 10-kJ decrease in potential…

A: The principle of conservation of energy states that energy can not be created nor destroyed it can…

Q: How long will it take an 850-kg car with a useful power output of 40.0 hp (1 hp equals 746 W) to…

A: Use work energy theorem

Q: Spiderman, whose mass is 80.0 kg, is dangling on the free end on the 12.0-m long rope, the other end…

A:

Q: A 5.6-kg box slides a distance of 13.0-m. If the coefficient of kinetic friction is 0.33, what is…

A: The given data   The mass of the box m = 5.6 kg The distance moved by the box is d = 13 m The…

Q: A box of winter jackets of mass 76 kg is droped from a stationary helicopter at an altitude of 98 m.…

A: The work done by the air resistance is the loss in kinetic energy according to conservation of…

Q: ne natural length of a spring is 8 inches. A force of 20 Ib stretches the spring to O in. Find the…

A:

Q: Asoccer player strikes a 428gramball with an initial velocity of 27.4m/s. The ball strikes the…

A: Given data:  Mass of ball (m) = 428 g = 0.428 kg Initial velocity (Vi) = 27.4 m/s Final velocity…

Q: A batter hit a 0.145kg baseball straight upward with an initial speed of 25.0m/s. How much work has…

A: concept

Q: A 3.11-kg model rocket is launched straight up. It reaches a maximum height of 91.5 m above where…

A: Given,  Mass(M) = 3.11 kgWork done by Air resistance(W) =-690 J

Q: You push a table through 3m with a force of 30N. How much work have you doneon the table? The table…

A: The expression for work done is, W=F×d       (I)              F=force,d=displacement

Q: Q.7. A crane lifts a load of 6000N through a vertical distance of 15m in 30s. Find the average…

A: Write the formula for the work done.

Q: A box is being moved upwards in the inclined plane along 80 cm as given in figure. Find the each…

A: Given- F1 = 40 N F2 = 20 N F3 = 50 N θ = 300 d = 80 cm = 0.8 m

Q: How much work is done by a 100N force if the box moves 4m. But the force is at an angle such that…

A:

Q: A stone manager pushes a 10 -kg box with a force of 25 N and directed at an angle of 37 °above…

A: Given  Mass of the box is m=10 kg Angle above the horizontal is θ=37° Displacement of the box is…

Q: What is the work don if by 15N force applied on the object and displaced by the 5 m ?

A: We know thatWorkdone=force×displacement

Q: Suppose the car approches a hill and has the intial speed 106 km/h at the bottom of the hill. The…

A: Given Data : The initial speed of the car at the bottom of the hill is given as u=106 ms

Q: A man pushes a lawn mower on a level lawn with a force of 200N. If only 60% of the totalapplied…

A: Given information: The force on the lawn rover (F) = 200 N The fraction of force used in the…

Q: A helicopter lifts a 100kg crate straight up via cable, with an acceleration of 0.8m/s2. If the…

A: Given data The mass of the crate is m = 100 kg. The acceleration of the cable is a = 0.8 m/s2. The…

Q: A boy pulls a 15-lb sled 50 ft along a horizontal surface at a constant speed. What work does he do…

A: Given data: Mass of sled is, m=15 lb=15×0.45=6.75 kg. Distance travelled by sled is, s=50…

Q: A fisherman reels in 12.0m of line while landing a fish, using a constant forward pull of 25.0N. How…

A: Given ,      the fisherman  reels the line (d) = 12 m      force of forward pull (F) = 25 N…

Q: If the ball is dropped with an initial potential energy of 19800J what would be its maximun kinetic…

A: Solution: According to the conservation of energy, total energy of the ball is constant. Hence,…

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: What is the work done (Nm) to a system with a mass of 20kg by lifting it using 2000N of force and…

A:

Q: A 35 kg box is dragged by a rope a distance of 3 m from rest to a speed of 2m/s along a horizontal…

A: Consider the initial speed of box be u, the acceleration of the box be a, the final speed of the box…

Q: A 1 kg skate rat drops from the top of a 3 m high half-pipe ramp. Ignoring friction, how much…

A: Given that the mass of the skate rat is m = 1Kg its is drop from 3 m height  so its has potential…

Q: A 6.0kg box is pulled across a frictionless surface for 60m. If the box experiences a change in…

A:

Q: A 4kg box is sliding across the floor with a kinetic energy of 107 J.  After friction has done -30 J…

A: Given, Mass, m= 4kg, KE, KE= 107 J, and Frictional force, Ff=-30 J.

Q: A student slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at…

A: Given : m = 80 kg d = 4 m u = 0.400

Q: A cart with mass of 20 kg is pushed horizontally by a man at a constant velocity. He performed work…

A: Given information: The work done by the man (W) = 4000 J The mass of the man (m) = 20 kg The…

Q: A 0.14-kg pinecone falls 16 m to the ground,where it lands with a speed of 13 m>s. (a) With what…

A:

Q: A 3.90-kg model rocket is launched straight up. It reaches a maximum height of 110 m above where its…

A: Given  Mass of rocket: 3.90 kg Maximum height h = 110 m Work done by air Wair=-768 J

Q: How much energy is required to propel a 60.0 KG person to 45.2 cm vertically? What is the person's…

A: Given data: Mass (m) = 60.0 kg Height (h) = 45.2 cm = 0.452 m Required: Energy and take off speed

Q: A box of winter jackets of mass 109 kg is droped from a stationary helicopter at an altitude of 135…

A: Given: The mass is m=109 kg. The altitude is h=135 m. The velocity is v=10 m/s. According to work…

Q: If you are in a car that is being pulled down a 56.0 m path with a force of 12.5 Newton’s (N), what…

A: Write the given values with suitable variables. d=56 mF=12.5 N Here, d denotes the distance and F…

Q: JC races with his classmates by running up the stairs to the top of the school building 15.8 m high.…

A: Given data: Height (h) = 15.8 m Time taken by JC = 3.1 minutes Time taken by LJ = 3.28 minutes Mass…

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

A:

Q: A 23 N rock is dropped from a height of 11.5 m, and the velocity right before hitting the ground is…

A:

Q: Mary, whose mass is 55.0 kg, starts from rest at the top of a water slide that is a height of 4.00 m…

A: Given,mass of the mary, m = 55.0 kgheight of the water level, h = 4.00 mwork done by friction, Wf =…

Q: A store manager pushes a 10 g box with a force of 25 N and drected at an angle of 37 above the…

A:

Q: If you push a crate horizontally with 100N across a 10-m factory floor and the friction between the…

A: