When the parachute is fully open, the effective drag coefficient of the skydiver plus the parachute increases to 60.0 kg/m . what is the drag force fdrag acting on the skydiver immediately after she has opened the parachute?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2