You do 1200J of work with gears. If the gears do 1000J of work, what is the efficiency of the gears?

A 10 ohm resistor has 5 a current in it. what is the voltage across the resistor?

A tractor pulls a wagon from rest with a constant force of 700 N eventually giving the wagon a speed of 20 km/h. how much work is done by the tractor in 3.5 min? whats the tractors power output?

A strip of land conneted to the shore, but then is eroded away by waves. it a column of land is left behind, it is called a

An upward force is applied to a 6.0-kilogram box. This force displaces the box upward by 10.00 meters. What is the work done by the force on the box?

A rocket, initially at rest on the ground, accelerates straight upward from rest with constant (net) acceleration 39.2 m/s^2. The acceleration period lasts for time 10.0 ss until the fuel is exhausted. After that, the rocket is in free fall.

If a man walks 17m east and then 17m south, the magnitude of the man's displacement is

Which type of mass movement makes a pattern of wrinkles, or terraces, on hillsides? landside mudflow soil creep rock slide

How is sun related to nuclear, electromagnetic, and heat energy?

Studies of gymnasts show that their high rate of injuries to the Achilles tendon is due to tensions in the tendon that typically reach 12 times body weight.

The total mechanical energy of a system: A) can never be negative. B) is constant, if only conservative forces act. C) is either all kinetic energy or all potential energy, at any one instant.