In which of the following sentences is work used in the scientific sense of the word?

a scientist works on an experiment in the laboratory.*

b sam and rachel pushed, but they could do no work on the car.

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

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 power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery