4.35 " BP You havejust landed on Planet X. You take out a [OD-g ball, release it from rest from a height of 10.0 m, and measure that it takes 2.2 s to reach the ground. You can ignore any force on the ball from the atmosphere of the planet. How much does the lOO-g ball weigh on the surface of Planet X? Figure P43? 4.3? .. Two adults and a child want to push a wheeled cart in the direction marked x in Fig. P4. 37. The two adults push with hori- zontal forces F I and F 2 as shown in the gure. (a) Find the magni- tude and direction of the smallest force that the child should exert. You can ignore the effects of fric- tion. (b) If the child exerts the minimum force found in part (a), the cart accelerates at 2.0 m/"s2 in the +xdirection. What is the weight of the cart? 4.51 -- BF Bill: A mysterious rocketpropelled object of mass 45.0 kg is initially at rest in the middle of the horizontal, frictionless surface of an ice-covered lake. Then a force directed east and with magnitude F(r) = (I63 N/s)! is applied. How far does the object travel in the rst 5.00 s after the force is applied