If m represents mass in kg, v represents speed in m/s, and r represents radius in m, show that the force f in the equation f=mv^2 /r can be expressed in the unit kg×m/s^2

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.