Aramp leading to the entrance of a building is inclied upward at an angle of 7 degree. a suitcase is to be pulled up the ramp by a handle that makes an angle of 35 degree with the horizontal. how mch force must be applied in the direction of the handle so that the component of the force parallel to the ramp is 50 lbs?

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules