In the winter olympics, an ice skater may lift his partner high above his head. a typical female ice skater weighs 400 n, and the male can usually lift her 1.4 m above the ice. how much work does the male ice skater exert when he lifts the female ice skater 1.4 m above the ice?

a. 560 j
b. 286 n-m
c. 560 n-m
d. 286 j

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

What is the most useful equation for electric power?

An object's buoyant force and weight mean the same thing.a. trueb. false