The gravitational field strength of Venus is 8.9 N/kg. If its radius is 6.05 x 10" m, the mass of Venus, expressed in scientific notation, is ab x 10"kg. The values for a, b, c, and d are and A speedboat heads west along a river at 250 km/h and encounters a current with a velocity of 150 km/h [2159]. What is the boat's ground velocity? Record your answer to the correct number of significant digits and using polar positive notation. km/h At the local skateboard park, a 50.0 kg skateboarder "drops"into a bowl. The bowl is 1.90 m deep, and its ramp makes an angle of 30.0" above the ground. Although the skateboarder bought the best wheel bearings available, there still is 100 N of resistive force as the skater travels down the 4.43 m ramp into the bowl. Calculate the speed of the skateboarder at the bottom of the bowl. m/'s