If the velocity of a long jumper during take-offat an angle of 30 degrees is 42 f/s, how fast is he moving forward (vx) and how fast is he moving upward (vy)? the answers should be in international units (m/s). 1 foot = 0.3048 m

Which of the following are appropriate acceleration units?

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)

Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?