One end of a cord is xed and a small 0.750-kg object is attached to the other end, where it swings in a section of a vertical object is 4.00 m/s. At this instant, find each of the following. I 9 : i? I I 69 (a) the tension in the cord T: 7.35 x Your response differs from the correct answer by more than 10%. Double check your calculations. N (b) the tangential and radial components of acceleration ar = m/s2 inward at = m/s2 downward tangent to the circle (c) the total acceleration atotal = m/s2 inward and below the cord at (d) Is your answer changed if the object is swinging down toward its lowest point instead of swinging up? Yes N0 (e) Explain your answer to part (d). A skydiver jumps from a slow-moving airplane. The skydiver's mass is 76.0 kg. After falling for some distance, she reaches a terminal speed of 45.6 m/s. (a) What is her acceleration (in m/s2) when her speed is 30.0 m/s? magnitude m/s2 direction ---Select--- 8 (b) What is the drag force (in N) on the skydiver when her speed is 45.6 m/s? magnitude N direction ---Select--- 8 (c) What is the drag force (in N) on the skydiver when her speed is 30.0 m/s? magnitude N direction ---Select--- 9 Need Help? The mass of a sports car is 1300 kg. The shape of the car is such that the aerodynamic drag coefficient is 0.250 and the frontal area is 2.00 m. Neglecting all other sources of friction, calculate the initial acceleration of the car, if it has been traveling at 120 km/h and is now shifted into neutral and is allowed to coast. (Take the density of air to be 1.295 kg/m3.) m/s2 Need Help? Read ItA small, spherical bead of mass 3.50 g is released from rest at t = 0 from a point under the surface of a viscous liquid. The terminal speed is observed to be VT = 2.02 cm/s. _, (3) Find the value of the constant b in the equation R = 413. N's/m (b) Find the time t at which the bead reaches 0.632vT. s (c) Find the value of the resistive force when the bead reaches terminal speed. N Need Help