68. Starting from rest, Megan zooms down a frictionless slide from an initial height of 4.0 m. What is her speed at the bottom of the slide?

Q: An 85.1-kg dad climbs to the second floor of his house. His gravitational potential energy increases…

A: Given data: Increase in PE of Dad = 1.95*103 J Mass of dad (M) = 85.1 kg ass of daughter (m) = 21.4…

Q: You pick up a 1 N box 1.5 m upwards and walk with it 10 meters across the room, after which you…

A: Weight of the box is W = 1 N Distance of the box moved upward and downward is d = 1.5 Distance moved…

Q: A 10 kg sled with a kid inside is sliding down a hill on dry snow. At point A, it has a speed of v=…

A:

Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…

A: The rate  of doing work is called power.

Q: A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The…

A: Given data:  Work done (W) = 350 J Height (h) = 9 m Required: Mass (m)

Q: Q40. Calculate the work done in moving a body of mass 50 kg through a height of 5 m. (g = 10mis) 250…

A:

Q: How much work does gravity do on the elevator? How much work does the tension in the elevator cable…

A: Given that, mass of the elevator and upward acceleration of the elevator and distance. Then We have…

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: You pick up a 1 N box 1.5 m upwards and walk with it 10 meters across the room, after which you…

A:

Q: A frog jumps straight up at 0.7 m/s from 0.6 m above ground. How fast is it after it is about to…

A: Initial velocity = u = 0.7 m/s Initial height = h = 0.6 m Final height below the ground = h' = 0.8 m…

Q: 3. Problem 7.49 of Chapter 7. A 15.0-kg stone slides down a snow-covered hill, leaving point A with…

A:

Q: A particle of mass 4.0 kg is constrained to move along the x-axis under a single force F(X) = -cx³,…

A:

Q: 5. A 0.50-kg ball is thrown vertically upward with an initial speed of 16.0 m/s. What is the kinetic…

A: Given Mass of ball = m = 0.50 kg initial velocity= u = 16 m/s We have to calculate the kinetic…

Q: 3> A block of mass m slides along a frictionless track as shown in the Figure. Its speed when it…

A: Given Data : The velocity at point A is given as vA=8 ms The velocity at point B is given as vB=3 ms

Q: A 55-kg girl is riding a 5 kg bike with 5 m/s on a ramp with 4 meters height and 8 meters length.…

A:

Q: A 2-kg brick is thrown downward from a height ?1 = 15 m to ?2 = 10 m. The initial kinetic energy of…

A:

Q: .At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at…

A:

Q: 2. Car 1 has 8 times the mass of car 2, but only 0.4 as much kinetic energy. What is the ratio…

A:

Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…

A: Given The mass of the man is m=95 kg. The height of the stairs is h=20 m. The time is taken by the…

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

A: