1. A uniform horizontal strut weighs 400.0 N. One end of the strut is attached to a hinged support at the wall, and the other end of the strut is attached to a 200.0-N weight. The strut is also supported by a cable attached between the end of the strut and the wall.
A) Find the tension in the cable.
B) Find the magnitude of the force at the hinge of the strut.
2. An astronaut lands on a distant un-manned planet having a radius of 4000 km. When he jumps with an initial speed of 4.00 m/s, he rises to a height of 1.60 m.
A) Calculate the mass of the planet.
B) Find the escape velocity associated with the planet.

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?