If you lift a 80 N book 50 cm off the floor, how much work did you do? 1. 0

2. 4000 J

3. 40 J

4. 1.6 J

A man pushes a couch a distance of 0.75 m. If 450 J of work is done, what is the magnitude of the force applied?

1. 16.9 J

2. 45

3. 1350 J

4. 2700 J

Asap i'm in class rn a 1,000-kg car is traveling 20 m/s on a flat stretch of road. it gets to a hill and coasts uphill until it stops. how high up the hill does the car travel? givens: equation: 1/2mv2initial=mghfinal solve for h. plug & chug, label.

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.