What is positive and negative work? Can I have an example of both?

What linear speed must an earth satellite have to be in a circular orbit at an altitude of 159 km?

You can increase the strength of an electromagnet's field by a. decreasing the current in the solenoid. b. decreasing the number of loops in the solenoid. c. using a stronger ferromagnetic material for the core. d. winding the coils more loosely.

John is asked to calculate the power output of a machine. What unit should be use for his answer? A. Newton B. Watt C. Joule D. Meter

An athlete jumping vertically on a trampoline leaves the surface with a velocity of 8.5 m/s upward. what maximum height does she reach?

When a trebuchet counterweight is hoisted by soldiers, what form of energy is transferred into the machine as work?

How does gravity influence our annual calendar?

A 0.500 kg block is sitting on a horizontal, frictionless surface. The block is connected to a horizontal spring with a force constant of 124 N/m. The other end of the horizontal spring rests against a wall. When a 100.

The velocity of waves in a ripple tank of a particular depth of water is 20 centimeters per second, and standing waves are produced with nodes spaced 2.0 centimeters apart. what is the frequency of the wave generator?

If a wave is generated in a Slinky and the wave hits a wall, the reflected wave will be

While spinning in a centrifuge a 70.0 KG astronaut experiences an acceleration of 2.00g, or twice the acceleration due to gravity on the earth. What is the centripetal force acting on her? A.) 6.86*10^3N B.) 1.37*10^3N C.) 1.40*10^2N D.) 3.46*10^4N