Planets A and B have the same mass, but planet A is half the size of planet B. Which statement correctly explains the weight you would experience on each
planet?
A. You would weigh less on planet A because the distance between
you and the planet's center of gravity would be smaller.
B. You would weigh the same on both planets because the masses of
the planets are the same.
C. You would weigh more on planet A because the distance between
you and the planet's center of gravity would be smaller.
D. You would weigh the same on both planets because your mass
would be the same on both.

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

What is the measurement of how fast an object moves relative to a reference point?