Katie kangaroo takes 0.25hours (15mins) to reach her friends house which is 7.5 miles away how fast was she hopping.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Which of the following is the best name for mgcl2

Abeam of electrons moves at right angles to a magnetic field of 4.5 × 10-2 tesla. if the electrons have a velocity of 6.5 × 106 meters/second, what is the force acting on the electrons? the value of q = -1.6 × 10-19 coulombs.